MANORHAVEN - Investigators say a ventilation problem may have led to the deadly boat explosion that killed a former mayor.

A 33-foot boat exploded just before 3 p.m. Wednesday as it was being refueled at Manhasset Bay Marina in the Manorhaven portion of Port Washington.

Investigators now say that improper venting of gas fumes may have been a primary factor in the explosion. Boats are typically equipped with fans that vent the fumes.

Former Plandome Manor Mayor Bob Hogan, 74, was killed in the blast. A marina worker sustained burns as he pushed the burning boat away from the dock.