Austin, Texas (CNN) Austin police just confirmed what residents have feared for weeks -- a suspected serial bomber is attacking their city.
For the fourth time this month, a device exploded on Austin residents. What makes Sunday night's blast especially terrifying is that the device was left on the side of a residential road and triggered by a tripwire, police said Monday.
Investigators have found similarities between that device and three previous bombs, which were stuffed inside packages and left on residents' doorsteps, Austin Police Chief Brian Manley said.
"We are clearly dealing with what we expect to be a serial bomber at this point," he said.
The latest device -- which was triggered by a tripwire -- shows "a higher level of sophistication, a higher level of skill," he said.
And unlike the victims of the previous blasts, the two men wounded in Sunday's explosion are white, Austin police said. Both men are expected to recover.
Latest developments
Police departments in Houston and San Antonio are sending bomb technicians and canine teams to Austin to help in the investigation, their police chiefs said Monday.
President Donald Trump has been briefed on the Austin bombings, a White House spokesman said Monday, adding the White House pledges its support to local law enforcement.
Three members of the Congressional Black Caucus called Monday for federal officials to classify the bombings as terrorist attacks and determine whether they are "ideologically or racially motivated."
Texas Gov. Greg Abbott announced more than $265,000 in emergency funding for police to purchase seven portable X-ray systems for use in detecting bombs and investigating suspicious packages.
The Travis Country neighborhood of Austin was on lockdown Monday, Manley said, as authorities investigate the pieces of evidence strewn across a wide area.
Manley asked anyone in the neighborhood with security camera footage to call police.
The Austin public school district says it couldn't send buses to the affected neighborhood Monday because of police activity.
An indiscriminate wake-up call
Many minority residents in Austin have been on edge since the bombings started, as the first three bombings killed or wounded minorities.
Several residents under lockdown Monday said they were stunned the latest attack happened in their neighborhood.
Unlike the first three bombings, which happened in east Austin, the latest attack happened in a predominantly white part of town.
Eliza May said because the first three bombings happening on the east side of the city, in predominantly minority areas, she hadn't been following the news closely.
May said that as a resident of the affluent Travis Country neighborhood , she assumed she had nothing to worry about.
"We feel safe. This isn't something that you'd expect around here," May said.
Now, "it's obvious that you have to be alert."
"This was a random bomb," she said. "This could have been any one of us."
Neighbor Shonda Mace said the bombing "is going to be (a) life-changing event for our neighborhood."
"I'm scared about what's going to happen next," she said.
Tripwire could give clues
"The use of a tripwire is far less discriminating than leaving parcel bombs at residences and suggests that the latest victims were not specifically targeted," the global think tank Stratfor Threat Lens said.
"The device's success, despite significantly different design, further suggests that the bomb maker behind these attacks is an accomplished one, and has likely to have received some training, perhaps as a military or police explosive ordnance disposal technician."
"As the bomb maker changes up design and geography, all residents of Austin and surrounding areas should avoid suspicious items," Stratfor Threat Lens said.
'Extra level of vigilance' needed
The latest blast came less than a week after police said the three previous explosions -- in a span of 10 days -- were connected. Those blasts killed a man and a teenager, and wounded two others.
Police are working under the belief that the explosions are related. Manley said they'll get a better idea with a post-blast analysis and examination of the device components.
In the meantime, Manley told residents not to touch or go near anything that looks suspicious.
"We now need the community to have an extra level of vigilance and pay attention to any suspicious device -- whether it be a package or a bag, a backpack -- anything that looks out of place," Manley said Monday. "Do not approach items like that."
APD is asking the public to remain vigilant and report anything suspicious. If you come across ANYTHING that looks suspicious, DO NOT touch, handle or disturb it. Keep a safe distance and call 9-1-1 immediately. pic.twitter.com/buJsLqeRy5 — Austin Police Dept (@Austin_Police) March 19, 2018
More resources for police
Texas Gov. Greg Abbott announced the release of $265,500 in emergency funding Monday for the Austin Police Department and the Texas Ranger Response Team to purchase seven portable X-ray systems.
The systems can be used at the scene and provide "clear visual evidence for rapid assessment of a package's safety," the governor's office said.
"I want to ensure everyone in the Austin region and the entire state that Texas is committed to providing every resource necessary to make sure these crimes are solved as quickly as possible," Abbott said in a statement.
Other Texas law enforcement agencies are contributing resources as well.
The Houston police department said Monday it's sending several teams to Austin to help with the investigation. They include bomb technicians, an explosive ordnance disposal team, and an explosives-trained dog and handler, Chief Art Acevedo said Monday.
"We stand with the Austin Police Department," Acevedo said.
The San Antonio Police Department dispatched two bomb technicians and a bomb dog to Austin on Monday morning, Police Chief William McManus said.
Shortly before the fourth bombing, the reward for information leading to the arrest of anyone responsible for the three blasts increased to a total of $115,000, authorities said.
Officials have urged residents to call police with any tips they may have, even if the information seems to be "inconsequential."
(CNN) Four bombings in 17 days have left the Texas capital on edge, as Austin police are warning the public not to take chances : If it looks suspicious -- whether it's a package, box or backpack -- do not approach it.
While authorities are offering a six-figure reward for information leading to an arrest in the bombings, which have killed two people , the latest attack Sunday seemed to follow a different pattern.
Where the first three package bombs were left on people's doorsteps or porches and killed or injured minorities, the most recent bomb Sunday was left on the side of the road in a predominantly white neighborhood and may have been triggered by a tripwire.
Still, authorities say "similarities" among the bombs have investigators operating under the belief all the bombs are related They suspect a serial bomber is behind the violence. Here's a look at what police say about each attack:
March 2
Anthony Stephan House was killed in the first of four bombings to rock Austin.
The first blast was reported about 6:55 a.m. local time in the Harris Ridge neighborhood of north Austin. It was a powerful device, essentially a pipe bomb, in a normal-sized delivery box, which would be a theme for the first three bombings.
Anthony Stephan House, 39, died from injuries he suffered after opening the package.
His LinkedIn profile said he was a senior project manager for Texas Quarries and participated in commercial projects throughout the state, including at University of Texas properties and the Phillips 66 headquarters in Houston.
March 12
Draylen Mason was a promising student and bassist in a youth orchestra.
The first of two bombs that day, it was detonated around 6:44 a.m. in the city's East MLK neighborhood. Like the bomb 10 days earlier, it had been left at the victim's home and it appeared to have been hand-delivered, rather than by any courier service. The bomb detonated when the victim brought it inside and opened it.
It killed 17-year-old Draylen Mason, a promising student who played stand-up bass in a youth orchestra and was taking college classes while in high school. A woman injured in the bombing suffered non-life-threatening injuries. Neighbors saw her in the yard covering her face with her hands and brought her blankets because the blast had ripped off some of her clothing, said Anne Marie Castillo, who lives five houses down from Mason.
Mason and House were both African-American.
"(Mason) was a young guy with so much future and potential. We talked a lot about college. He hugged me every morning before class," Austin Community College professor Samuel Osemene said.
March 12 again
JUST WATCHED Deadly package bombs were left on doorsteps Replay More Videos ... MUST WATCH Deadly package bombs were left on doorsteps 01:56
Police were processing the scene at the East MLK bombing when another bomb erupted in the Montopolis neighborhood of southeast Austin, a few miles from Austin-Bergstrom International Airport.
The midday blast left a 75-year-old Hispanic woman badly injured, spurring police to leave open the possibility the bombings are hate crimes, given the victims were, at this point, all minorities.
"We believe that the recent explosive incidents that have occurred in the city of Austin were meant to send a message ," Austin Police Chief Brian Manley said.
March 18
JUST WATCHED Police: Tripwire may have triggered explosion Replay More Videos ... MUST WATCH Police: Tripwire may have triggered explosion 01:42
This was the first explosion to break with the pattern of doorstep deliveries. Instead, this bomb was left on the side of the road in the upscale Travis Country neighborhood of southwest Austin. It could have maimed any passerby , police said.
Two white men, a 22- and 23-year-old, who were walking alongside the road when the bomb detonated, were taken to a hospital with serious but non-life threatening injuries.
Despite the new modus operandi, Manley said investigators believe the bombings are connected. Hundreds of federal agents are now involved in the investigation.
Four bombings this month in Austin, Tex., including one on Sunday night, have killed two people and injured four, and they have put the state capital on high alert.
Date Description March 18 Package on the side of the road injured two March 12 Package outside house injured a 75-year-old woman March 12 Package outside house killed one and injured another March 2 Package on front porch killed one
4 Bombing on Sunday Night
The authorities responded to Dawn Song Drive in southwest Austin after reports of an explosion around 8:30 p.m. on Sunday. Two men in their 20s were seriously injured, according to the Austin-Travis County Emergency Medical Services.
In a press briefing, Chief Brian Manley of the Austin Police Department reported that a package was left on the side of the road and that the bomb was possibly triggered by tripwire, unlike the previous bombings.
The scene outside the bombing on Sunday night that injured two people. Nick Wagner/Austin American-Statesman, via Associated Press
2 3 Two Bombings on March 12
An explosion was reported on Oldfort Hill Drive in East Austin at about 6:45 a.m. on March 12; a 17-year-old, Draylen Mason, was killed and his mother was critically injured. She opened a package in the kitchen after bringing it in from the front porch of her house, according to Chief Manley.
Later that morning, around 11:50 a.m., another explosion was reported on Galindo Street, only a few miles away. A 75-year-old Hispanic woman was significantly injured when she picked up a package left outside of her house.
The scene near Galindo Street after the bombing. Suzanne Cordeiro/Agence France-Presse -- Getty Images
1 First Bombing on March 2
At about 6:55 a.m. on March 2, Anthony Stephan House, 39, was killed after he handled a box left on his front porch.
Outside the residence of Anthony Stephan House. Tamir Kalifa for The New York Times
The damage at the doorway of the house, partly covered by plywood. Jon Herskovitz/Reuters
The Common Links
In a press briefing after the second round of bombings, the Austin Police Department confirmed that the three cases on March 2 and March 12 were connected.
“What we have right now are similarities that we believe link the three cases together,” Chief Manley said.
All three episodes involved cardboard packages that were left on doorsteps overnight, the police chief said. None of the packages were delivered through the Postal Service or any other delivery services.
The police have so far been unable to identify any motives or commonalities among the victims.
The #FBI, ATF, and Austin Police Department seek the public's assistance with identifying the individual(s) responsible for the package bombs which injured and killed several Austin, Texas, residents. Reward offered: https://t.co/fcGIut3Ou8 pic.twitter.com/wjdbWZciQZ — FBI Most Wanted (@FBIMostWanted) 2018年3月18日
“We are not ruling anything out at this point,” Chief Manley said when asked about the potential targets of the attacks. “Because when you rule something out, you limit your focus of the investigation and you might miss something.”
Two of the people killed after handling the packages were members of African-American families with deep roots in the city’s black, religious and civil rights groups.
More than 500 officers and agents have been called in to assist with the investigation, including F.B.I. profiling experts from Quantico, Va., who were trying to build a profile of a possible perpetrator, said Christopher Combs, special agent in charge of the bureau’s San Antonio office.
“We don’t know why the bomber is doing this. We don’t know his reasons,” said Mr. Combs, adding that the authorities were especially hoping to understand why whoever was behind the bombings was wielding “this level of violence.”
“We would really like the bomber to contact us so we can talk to him,” he said.
So far, the police have been alerted to more than 600 packages deemed suspicious, as residents have phoned and emailed friends and family to verify the provenance of parcels before opening them.
Chief Manley signaled that the authorities could be getting closer to labeling the attacks as domestic terrorism. “We will have to determine if we see a specific ideology behind this, or something that will lead us along with our federal partners to make that decision,” he said.
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He said the fourth bombing demonstrated a higher level of sophistication than the previous three, as well as a “significant change” in the way the victims were targeted.
In the first three bombings, cardboard boxes were discovered outside homes, seeming to target specific individuals. The packages were not delivered by the Postal Service or any other package delivery company, but instead appeared to have been left outside overnight. They detonated when they were handled by the people who discovered them.
The fourth bomb, however, which exploded on Sunday, was left on a roadside, and was believed to have been detonated with the use of a tripwire by two random passers-by, Chief Manley said. He warned residents that a future bomb could also be connected to a tripwire, which can be fashioned from hard-to-see materials such as fishing line or filament.
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“We have a high degree of confidence that the same individual built all these devices,” Fred Milanowski, special agent in charge of the Bureau of Alcohol, Tobacco, Firearms and Explosives in Houston, told reporters.
He declined to discuss details of the latest bomb’s construction, but described the way that tripwire explosive devices are assembled.
“In general, the tripwire is going to be attached to a switch, and it’s going to be anchored down on the other side, obviously, so that when somebody actually trips on it, they will activate that switch,” he said. “That’s why we call it a victim-activated device. It’s random. It’s not targeted. The randomness that a child could have come across that is very concerning to us.”
With so little known about who is behind the attacks and whether they will continue, the city is on edge, with many residents appearing unsure of whether to proceed with normal life or stay in hiding.
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“I think everyone in Austin is in the process of trying to figure out exactly how nervous to be,” said Stephen Harrigan, an author and essayist who has lived in Austin for more than 50 years and whose home is about eight miles from the scene of Sunday’s explosion.
“Are these bombings targeted acts of murder with a specific motive behind them — which is horrible enough — or do they represent something broader and more random?” he said.
Thad Holt, 76, who lives in the gated condominium community of 5000 Mission Oaks a few miles from Sunday’s bomb site, said an occasional car break-in is the kind of crime most typical in the neighborhood.
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“It’s too close for comfort,” Mr. Holt said. “It sort of puts you on edge. It puts the whole town on edge.”
Richard Herrington, 75, a retired pharmacist who lives about a half-mile from the blast site, said he and his family had gone hiking Sunday afternoon near the street where the tripwire was set and went off later that evening.
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“My oldest granddaughter, age 7, said, ‘Grandpa, I want to walk on the street where there’s the most shade,’” Mr. Herrington said. “We could have very easily walked down that street because there is shade. We could have been on that street and maybe the tripwire was there already, I don’t know. I’m anxious for our community because we don’t know when and where it’s going to happen again. I feel like it will happen again.”
At about 8:30 p.m. on Sunday, Mr. Herrington said, he and his wife were watching an N.C.A.A. basketball game when the blast occurred. “I was in the military. Never in combat. If you’ve been in the military and you hear a mortar round go off, it has a thump. And that’s how I knew it was a bomb, because it was a distinctive thump like that.”
The four neighborhoods where the explosions have occurred are varied economic and demographic slices of Austin. The first three bomb scenes were in largely working- and middle-class sections of northeast and east Austin, with sizable black, Hispanic and Asian populations. Hammocks and baby swings hang from tree branches on front lawns near Haverford Drive, the site of the first bombing on March 2. The explosion on Sunday took place in Travis Country, an upscale planned community that is largely white. It is a hilly and wooded area near a patchwork of busy highways and parkways.
After the first three bombings, many community leaders and residents speculated that the attacks appeared to be hate crimes, because those injured were black and Hispanic.
The first package killed Anthony Stephan House, a 39-year-old black man, after he discovered it outside his home. The second targeted two more African-Americans — Draylen Mason, 17, who was killed, and his mother, who was critically injured after she brought the package inside from their front porch and opened it in the kitchen. The third left a 75-year-old Hispanic woman seriously injured.
The explosion Sunday, which injured two white men, suggested that the bomber or bombers were driven by something other than racial bias.
In Monday’s news conference, the authorities said they had received a large number of tips on who could be behind the attacks, but that so far, none had led to the identification of a suspect.
In news conferences, officials have begun to take the unusual step of appealing to the bomber or bombers directly.
“I will reach out to the suspect or suspects and ask that you contact us,” Chief Manley said. “There are innocent people getting hurt in this community and it needs to come to a stop.”
