The Hunt Continues For Austin Serial Bomber

The hunt for the serial bomber who has been leaving deadly explosives in packages on Austin doorsteps took new turn Monday when investigators said the fourth blast was triggered by a nearly invisible tripwire. Police and federal agents said that suggests a “higher level of sophistication” than they have seen before, and means the carnage is now random, rather than directed at someone in particular. Now, the fifth bomb exploded in Austin. It was on a FedEx truck being delivered.