Bomb fears mounting

THE hunt for the serial bomber who has been leaving deadly explosives in packages on Austin doorsteps took an even more sinister turn Monday when investigators said the fourth and latest blast was triggered along a street by a nearly invisible trip-wire.

Police and federal agents said that suggests a “higher level of sophistication” than previously seen, and means the carnage is now random, rather than targeted.

Two people have now been killed and four wounded in bombings in less than three weeks.