CONCORD - A dam has broken and forced the closure of a stretch of the Cambridge Turnpike called Crosby's Corner.

That's where the road meets Route 2, which remains open as crews clean up the mess.

A $48 million improvement project is underway at Crosby's Corner, but it's not clear if there's any connection to the dam break.

There are no reports of any injuries at this point.

Concord is about 20 miles northwest of Boston.