The facility was sealed off as police and federal agents hunted for clues. The blast occurred about 12:30 a.m. local time when a package traveling along an automated conveyor belt exploded, according to Chief Michael Hansen of the Schertz Police. in San Antonio, refused to confirm local media reports that the package at the FedEx facility contained nails and other shrapnel. The four bombings in Austin — the first on March 2, the most recent on Sunday — have killed two people and injured several others. The first three were simple package bombs, but the fourth, which detonated Sunday evening and injured two people, was triggered by a tripwire.

Source: New York Times March 20, 2018 11:12 UTC