Topeka ? Shawnee County authorities say a car pulled from Lake Shawnee with a body inside was last registered in 1984.

The car was pulled from the lake on Saturday near the Shawnee Yacht Club. The coroner verified that at least one set of adult human remains were inside the car.

Shawnee County Sheriff’s Lt. Jay Simecka says investigators continue to try and identify the remains. He told The Topeka Capital-Journal that as of Monday, the death was considered suspicious.

He says the car has tentatively been identified as a mid-1970s Oldsmobile 98, perhaps a 1974 model with two doors. It has a Wisconsin license plate bearing a 1984 registration sticker. The car’s vehicle identification number isn’t readable, and investigators are using a technique to try to lift the VIN number.