Investigators quickly realised that the bombings strongly resembled a March 2 case involving a package that exploded and killed a man in his northeast Austin home. The man and the teenage victim of the explosions are Black and the woman is Hispanic, and investigators have not ruled out the possibility that the incidents were racially motivated.
"These packages are being delivered in the night time hours and in the morning when the resident comes out they find them on their doorstep".
Davis says she's friends with the woman who was injured, who she says is the mother of the 17-year-old who died.
A second explosion, about 4 miles away in southeastern Austin, injured a 75-year-old woman in the working-class Hispanic community of Montopolis.
Austin-Travis County EMS says a 17-year-old boy died earlier Monday after an explosion around 6:44 a.m.in the 4800 block of Oldfort Hill Drive, which is near the intersection of Springdale Road and East Martin Luther King Jr.
Austin resident Trey Mathis said he expected a package to be delivered Monday but was still nervous when it showed up.
Manley stated, "We are not going to tolerate this in Austin, and you have seen every stop will be pulled out...the federal agencies are with us to lend us a hand and to bring this to as quick a resolution as possible".
Austin's interim police chief says one of the women found a package in her front yard and when she picked it up, the box detonated.
"Enjoy yourself, have a good time", Manley said.
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"The damage is significant, and there's a lot of evidence that needs to be collected", Manley said.
"It's just a regular family neighborhood", Reynolds said.
Manley would only say that "these are very powerful devices" and "there's a certain level of skill required to move a device like this".
Jeff Key, a former explosives specialist for ATF, said investigators will be focusing on tracing the component parts of the devices and searching for connections between the victims. "With three reported explosions in the Austin area, I want to urge all Texans to report any suspicious or unexpected packages arriving by mail to local law enforcement authorities".
Manley urged the community to speak up if they have any information or have any suspicions. The blast "sounded like a cannon", said Kenneth Thompson Sr., who lives across the street from the house where the first explosion occurred. In a statement issued on Tuesday, Gov. Abbot said he had been briefed on the recent blasts which have claimed the lives two people and injured two others.
He gave few details about the explosives, beyond saying the boxes were an "average size letter box" and "not particularly large".
The explosions happened within about 15 miles of each other.
The Bureau of Alcohol Tobacco and Firearms said a national response team would join Austin police in the investigation.
"We do not know yet whether the victims are the intended targets", he said, adding that some homes had multiple residents and the bomber may have also targeted the wrong addresses.