Lake Erie

The group were riding snow mobiles and all terrain vehicles (ATVs) on the frozen lake when the ice sheet broke away near Catawba Island.

Eleven members of the stranded group were rescued by a US Coast Guard helicopter and airboat on Sunday.

Authorities thanked a "good Samaritan" who assisted the remaining seven back to safety in a private airboat.

The group was spotted on the floating sheet of ice by a US Coast Guard helicopter which began its rescue at 13:00 (18:00 GMT) on Sunday.

The mayor and police chief of the city of Sheffield Lake told reporters that Sidney Heidrick's body was found Saturday afternoon not far from where he was last seen Friday at around 4:30 p.m. EDT.

The exact time and how he was located weren't released immediately. Authorities say he apparently drowned.

The FBI, Coast Guard and some two dozen other federal, state and local agencies participated in the search, which also drew hundreds of volunteers.

Authorities say he was visiting his grandparents' house and apparently walked off Friday.