PARISHVILLE -- A man who unsuccessfully tried to save two others who drove their snowmobiles into open water on a Raquette River reservoir has been released after treatment for hypothermia.

Daniel Campbell, 56, of Hamlin, was snowmobiling on the ice at Rainbow Falls Reservoir in the Town of Parishville when, at about 8 p.m., two others he was with, Robert G. Campbell, 78, of Canton, operating a 2004 Polaris snowmobile, and Robert P. Whalen, 87, reportedly of Canton, on an unidentified snowmobile, became disoriented in snowy conditions and drove their snowmobiles into open water.

Daniel Campbell and David Livingston, 51, of Conesus, were able to avoid the open water and they immediately contacted emergency services. The two obtained a canoe and went to help the older men when the younger Campbell also fell in. They were unsuccessful in saving the older men, who were submerged in the icy water.

The younger Campbell was pulled from the water and taken to Canton-Potsdam Hospital for treatment and has been released.

The bodies of Robert Campbell and Robert Whalen were retrieved after considerable effort involving the New York State Dept. of Environmental Conservation, St. Lawrence County Sheriff’s Department, Colton Fire and Rescue, Parishville Fire and Rescue, Lisbon Fire Department Dive Team, Massena Rescue Dive Team, Waddington Fire Department Air Boat and Dive Team, and Potsdam Rescue. The bodies were also taken to the hospital where they were officially declared dead by St. Lawrence County Coroner June Wood.

The cause of death is pending investigation.

Both of the snowmobiles that went into the water remain submerged in the reservoir and are expected to be extracted in the coming days, according to state police.