A string of bombings in Austin this month have the city on edge. Two people have been killed and four others hurt. The most recent explosion in Austin - the fourth -- was Sunday. Two men were sent to the hospital.
The Austin Police Department, state, and federal agencies are racing to figure out who's behind the bombings.
Today , the radius of their investigation grew. Early this morning, a package exploded at a FedEx facility in Schertz, Texas...outside of San Antonio. And that was just the beginning. Texas Public Radio's Joey Palacios starts our story.