The 1:43 p.m. incident occurred near Main Lake Dock near Prospect Point, NJSP Trooper Alejandro Goez said.
Goez did not know the cause of the incident as of 4 p.m.
The Department of Environmental Protection, local fire department and county HazMat team were able to remove most of the fuel from the water.
A private company was on its way to salvage the boat.
Check back for details.
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