MILFORD, Mass. (AP) -- The death of a Rhode Island teenager while swimming in a Massachusetts quarry appears to be a tragic accident, officials said Monday, minutes after the body was recovered.

Divers found the body of Nentor Dahn, 18, of Providence, in Fletcher Quarry in Milford at about 10:15 a.m. Monday in about 60 to 70 feet of water and 10 feet from the quarry wall.

Deputy Police Chief James Heron said it appeared to be an accidental drowning. Alcohol didn't appear to be involved, and an autopsy was scheduled.

Dahn, who just graduated from the Providence Career and Technical Academy, and several friends went to the quarry Sunday afternoon to swim.

Dahn, following a couple of his friends, jumped about 50 feet from a ledge, landed in the water awkwardly and did not resurface, witnesses told police. The friends were questioned and released, Heron said.

The water in the isolated and privately-owned quarry is more than 100 feet deep in some areas and is full of debris, including old cars, Fire Chief Bill Touhey. The water is cold and visibility is poor, he said.

It's almost impossible to keep trespassers away from the dangerous quarries in the area, police said. Teens park on private property or in nearby fast-food restaurant lots and walk through the woods to the quarries.