William Ayers Was Unavailable for Comment

This is what the left used to do back in the heyday of the 1960s.

I wonder who was behind this today?

Federal courthouse hit by pipe bomb

SAN DIEGO – A pipe bomb or series of pipe bombs exploded at the Edward J. Schwartz Federal Courthouse downtown early Sunday morning, sending shrapnel into a courtyard and to the eighth floor of a building across the street.

Two guards with the Federal Protective Service, who were inside the building, called authorities when they heard the explosion at 1:40 a.m. on Front Street near Broadway. The guards were not injured.

Firefighters, police, FBI and Alcohol, Tobacco and Firearms agents arrived minutes later to find the front entrance and the lobby of the building damaged.

The cause is believed to have been a bomb or bombs that detonated at once and caused a single explosion, said Keith Slotter, FBI special agent in charge of San Diego.

Before the investigation began, San Diego Metro Arson Strike Team investigators and ATF bomb investigators searched the area to make sure there were no other explosives.

Update: Instapundit links. Thanks!

Curious at the lack of interest in this story, I was searching around and found another instance of a pipe bomb at a FedEx facility in San Diego April 25 at almost the exact same time of the day.

A pipe bomb blast shattered the glass in the front door of a Federal Express distribution facility in the Webster area Friday and a second pipe bomb was discovered in the parking lot and was safely defused, police said.

The blast occurred in the 1600 block of 47th Street and Federal Boulevard at 1:47 a.m., according to San Diego police Sgt. Kerry Tom.

Hmm.

Update II: I may have been on to something.

An explosion early this morning at the federal courthouse in San Diego may be the work of a serial bomber who in April set off bombs at a Federal Express facility in the city, law enforcement officials said.
...
The method of attack was similar to the April 25, 2008, explosion at a FedEx facility in San Diego. That bombing occurred about 2 a.m. This one was set off at 1:40 a.m., according to an FBI press statement.

Thanks also to see-dubya for the link at Michelle Malkin.