(NECN: Jennifer Eagan, Boston, Mass.) - The winter weather is being blamed for a partial roof collapse in downtown Boston.
While the debris has been cleared, the area near the Tip O'Neill federal building is still considered unsafe, after a large section of the overhang came crashing down on Monday night.
It happened around 8 p.m., after a pipe burst, officials said.
It's still roped off by police tape, and security is guarding the area.
The Tip O'Neill federal building houses dozens of businesses, from Boston's passport agency to the IRS.
The building was closed at the time of the collapse, so there were no injuries. It could have been much worse, as Celtics fans filled the TD Garden for Monday night's game.
There is plenty of cleanup required.