The Boston Fire Department reports three boats caught on fire at the Constitution Marina around 11:20 p.m. on Tuesday.
The department estimates damage at $1 million, and says two boats sank. There were no injuries, and the cause remains under investigation.
Both the BFD and Massport harbor units responded to the fire - and used both water and foam against the fire. BFD firefighters also fought the blaze from trucks on the North Washington Street bridge.