A Westchester police boat on Sunday, March 13, 2016, sails...

A Westchester police boat  on Sunday, March 13, 2016, sails near near the Tappan Zee Bridge in Tarrytown, where a tugboat crashed and sank. Credit: Koki Takahashi

The two men whose bodies were recovered after their tugboat crashed and sank in the Hudson River on Saturday died from drowning, an autopsy found.

Westchester County Executive Rob Astorino announced the results in a news conference Monday afternoon, adding that commercial divers were at the scene, assessing the damage. Their work is the first step in creating a salvage plan that ultimately will be sent to the U.S. Coast Guard for approval.

There is no exact timeline for the effort, though the tugboat’s recovery is expected to begin within days.

The bodies of crew member Timothy Conklin, 29, of Westbury, and the vessel’s captain, Paul Amon, 62, of Bayville, New Jersey, were recovered this weekend.

A third man, Harry Hernandez, 56, of Staten Island, has not been found.

“We still don’t know for certain where the third body is — whether his body is still inside the boat, underwater, or whether it is somewhere else,” Astorino said.

The police dive was called off “after every reachable part of the tugboat was searched,” the county executive said, adding portions of the 90-foot vessel were inaccessible because of severe damage.

The tugboat, called Specialist, was working with two others pushing a crane barge down the river to a terminal in New Jersey from Albany. The crash happened at 5:18 a.m. and it is believed the vessel sank shortly after.

Gov. Andrew M. Cuomo said this weekend the crew realized too late that the tugboat was too far to the right. It sank in about 40 feet of water, dumping roughly 5,000 gallons of diesel fuel into the river.

The spill’s cleanup already has begun.

Amon’s body was recovered Saturday in the water and Conklin’s was recovered a day later inside the tugboat.

The crash remains under investigation. Witnesses, including workers aboard the barge, are being interviewed.

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