This was different, however, in that it was not delivered to someone’s house but set up with a trip wire on the sidewalk, which could get anyone.

Via Free Beacon:

AUSTIN, Texas (Reuters) – Four bombs that have gone off this month around Austin, Texas, with the latest injuring two men on Sunday, have similarities that lead investigators to believe they are the work of a serial bomber, police said on Monday.

Sunday’s bomb may have been activated by a trip wire, a more advanced design than the previous explosions that were set off when victims handled packages that were left on doorsteps. Those packages killed two earlier this month.

“We are clearly dealing with what we expect to be a serial bomber at this point,” Austin Police Chief Brian Manley told a press conference. “We have seen similarities in the devices that exploded here last night and the other three devices.”

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