Austin police Chief Brian Manley said at a news conference that investigators believe the attacks are linked because in each case, the package bombs were left on the victims' front doorsteps and not delivered by a mail service.
Police have confirmed a "package" explosion that killed one male teenager and injured a woman in Austin, Texas Monday morning.
The United States Postal Service told police that they reviewed their records, and they can confirm that the package did not come through the postal service.
Authorities are investigating whether the explosion is linked to a similar blast on March 2 that killed a 39-year-old man.
The latest explosion occurred about five miles from the Austin Convention Center, the site of South by Southwest activities on Monday.
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Officials told the Austin American-Statesman that they will try to determine any similarities between the packaging and explosive material.
She said that for now, Austin police will remain in charge of the investigation with federal agents assisting. Police say the teen died at the scene, while the woman was taken to a hospital with life-threatening injuries.
The package detonated early Monday.
Monday's explosion follows a deadly explosion at a home in Northeast Austin on Friday, March 2.
Since then, authorities have not released any information on the device that caused the explosion, nor have they named anyone who may have been involved.