Investigators on Monday work at the scene of a bomb explosion on Dawn Song Drive in Austin, Texas, that seriously injured two men on Sunday. Two people have now been killed and four wounded in bombings over a span of less than three weeks. /AP
AUSTIN, Texas – The hunt for the serial bomber, who has been leaving deadly explosives in packages on Austin doorsteps, took an even more sinister turn on Monday when investigators said the fourth and latest blast was triggered along a street by a nearly invisible tripwire.
Police and federal agents said the explosive device suggests a “higher level of sophistication” than they have seen before, and means the carnage is now random, rather than targeted at someone in particular.
Underscoring that point, a relative said the most-recent explosion left what appeared to be nails stuck in his grandson’s knees.
“The game went up a little bit — well, it went up a lot yesterday with the tripwire,” Christopher Combs, FBI agent in charge of the bureau’s San Antonio division, said in an interview.
Two people have now been killed and four wounded in bombings over a span of less than three weeks.
The latest happened on Sunday night in southwest Austin’s quiet Travis Country neighborhood, wounding two men in their 20s who were walking in the dark. They suffered what police said were significant injuries and remained hospitalized in stable condition.
Police have not identified the victims, but William Grote told The Associated Press that his grandson was one of them, saying he is cognizant but still in a lot of pain. Grote said one of them was riding a bike in the street and the other was on a sidewalk when they crossed a tripwire that he said knocked “them both off their feet.”
“It was so dark they couldn’t tell and they tripped,” Grote said. “They didn’t see it. It was a wire. And it blew up.”
Grote said his son, who lives about 91 meters (100 yards) away from the blast, heard the explosion and raced outside.
“Both of them were kind of bleeding profusely,” Grote said.
That was a departure from the three earlier bombings, which involved parcels left on doorsteps that detonated when moved or opened.
The tripwire twist heightened the fear around Austin, a town famous for its cool, hipster attitude.
“It’s creepy,” said Erin Mays, 33. “I’m not a scared person, but this feels very next-door-neighbor kind of stuff.”
Authorities repeated prior warnings about not touching unexpected packages and also issued new ones to be wary of any stray object left in public, especially one with wires protruding.