http://www.mercurynews.com/news/ci_9150867

Explosion rattles San Diego federal courthouse
The Associated Press
Article Launched: 05/04/2008 08:46:19 AM PDT

SAN DIEGO—An early morning explosion at the federal courthouse in downtown San Diego left a door damaged and blew out a window.

Sgt. Bob Dare of the San Diego Police Department says the loud blast occurred at about 1:40 a.m. Sunday. Streets in the area have been closed.

No injuries were reported. The explosion is under investigation.

FBI Special Agent Darrell Foxworth told a local TV station it appears the explosion may have been caused by a pipe bomb.