The guy who called it in as a bomb threat is going to have some explaining to do.

A mechanical failure that was initially believed to be a pipe bomb caused damage to a roof near a Jewish synagogue early Thursday morning.

The incident took place near the Chabad House of Santa Monica at 1448 17th Street at 6:45 a.m. Some debris from the explosion landed on a nearby roof, but no injuries were immediately reported.

via Mechanical Failure Caused Explosion By Santa Monica Synagogue « CBS Los Angeles.