Austin likely facing 'serial bomber,' police chief says

AUSTIN, Texas — Fear escalated across Austin on Monday after the fourth bombing this month — this time, a blast that was triggered by a tripwire and demonstrated what police said was a "higher level of sophistication" than the package bombs used in the previous attacks.Two men in their 20s were wounded Sunday night as they walked along a street and were hospitalized in stable condition. The three earlier bombings since March 2 left two people dead and two wounded."We are clearly deal