The San Diego federal court is closed today (Monday) so reparations can be made after a pipe bomb exploded early Sunday.

The powerful blast wrecked the building’s front entrance and the lobby area, an FBI spokesperson said. Fortunately, the explosion at Edward J. Schwartz Federal Courthouse
which occurred at about 1:40 a.m. had no victims.

After the area was sealed off, about 40 agents searched the site for explosives. Evidence was gathered and is currently under analysis by bomb experts at an FBI laboratory in Virginia.

"It's too early to tell if it's terrorism-related. It does not appear to be right now," said FBI spokesman Darrell Foxworth.

The blast was so powerful that debris was found lodged in a window about eight stories up the neighboring AT&T building.

There were few people around the building at the time of the blast. The San Diego federal court building, which is near the city's waterfront, is situated a block from nightclubs in the Gaslamp Quarter.

FBI agents are currently checking the security cameras in the area, but at the time of the explosion there were none facing the entrance, Foxworth said. The explosion was reported by two guards that were in the building at that time.

Police investigators said nobody claimed the explosion as a bomb attack and there were no threats before it. No arrests have been made as the investigation continues.

The streets around the San Diego federal court were closed until Sunday afternoon.