LONGVIEW, Wash. (AP) — An autopsy shows that a southwestern Washington man who was pulled out of Silver Lake died from drowning and blunt force chest trauma.

The Daily News reports investigators say Paul David Elf of Castle Rock may have been hit by a boat.

The autopsy shows that the 42-year-old sustained broken ribs and a cracked vertebra in his neck.

A boater found Elf face down at Silver Lake Saturday.

He was pulled out of the water and people in the area performed CPR on him which restored his pulse.

He died Sunday at St. John Medical Center in Longview.

Detectives have been told that unidentified man told people in the area that he struck something while boating in the lake.

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Information from: The Daily News, http://www.tdn.com