Updated to include autopsy results at 2:55 p.m. Feb. 7

PIERCEFIELD -- Two brothers from the Buffalo area who owned a camp here are dead after their snowmobiles fell through the ice of Raquette Pond over the weekend.

State police on Tuesday found Stephen Sattler, 67, and his brother Edward Sattler, 64, both of Blasdell, dead in the pond.

On Sunday around 6:30 p.m., a relative who was concerned about the brothers after she was not able to contact them contacted New York State Police. They were reportedly staying in the Piercefield area for the weekend, troopers said.

An investigation revealed the brothers had traveled to their family camp in Piercefield for a snowmobiling vacation. Family members had last heard from them on Saturday and reported them missing on Sunday evening. Following the report, police began to investigate and search.

On Monday, state troopers, New York State Department of Environmental Conservation, and New York State Forest Rangers continued search efforts. Around 10:30 a.m., a state police helicopter made a sighting of the individuals and their snowmobiles on Raquette Pond, just west of Tupper Lake.

State Police and DEC airboats and divers responded to the area and found them dead in the water. Franklin County Coroner Shawn Stuart responded to the scene and has since ruled the manner of their deaths accidental. Initial investigation revealed that the subjects were operating their snowmobiles on the frozen lake and then encountered thin ice and open water, troopers said.

Dr. C. Francis Varga performed autopsies on Tuesday and determined the cause of death for both to be asphyxiation due to fresh water drowning.

Troopers say their probe continues and they ask anyone with information to contact them a (518) 897-2000.