Round Rock TX is north of Austin, perp was southbound on I-35 heading towards Austin. (maybe he was getting ready to drop or mail off another package when he figured out police were on his tail, he may have set off his package bomb as they closed in on him)
(History trivia)......the Chisholm Trail cut through what is now Round Rock, Tx
You can clearly see the wagon ruts in the creekbed.
Tony Plohetski (Austin reporter on Twitter)
Verified account
13 minutes ago
NOW: Witnesses along I-35 in Round Rock describing confrontation between police and suspect.
1 hour ago
BREAKING: Sources say the suspect killed himself using an explosive device.
1 hour ago
BREAKING: Officials say police traced suspect using mix of cell phone technology, security video, store receipts.
1 hour ago
BREAKING: Bombing suspect is dead, law enforcement sources confirm.