LACONIA — A boat filled with rainwater sank and spilled oil into Lake Winnipesaukee Sunday before it was towed out of the water.

Weirs Beach Fire Station Lt. Jeff Desrochers said a 19-foot motorboat, tied to a dock in Paugus Bay, became heavy with rainfall and sank around 1:45 p.m. Sunday.

When it went under, the boat had an estimated seven gallons of fuel on board, which began to spread into the lake.

Desrochers said his department deployed oil containment booms, which surrounded the spill and prevented it from spreading much beyond the dock area.

The New Hampshire Department of Environmental Services was called, and the boat was floated to the surface and towed from the scene.