Crews are currently battling a large fire after a natural gas line exploded at a commercial building in Nashua, New Hampshire.

Three firefighters were injured when a natural gas leak caused an explosion and fire at a New Hampshire mental health center, but the building’s tenants and clients all evacuated safely.

Police say an explosion inside a building on the Harvard Medical School campus in Boston early Saturday morning appears to have been an intentional act. The Harvard University Police Department said ...