Renfrew OPP are investigating after a swimmer allegedly drowned after failing to resurface at Logos Land Resort near Cobden on Sunday.
They say they were called to the scene, located in the Township of Whitewater Region, around 2:30 p.m.
They say the victim was an 18-year-old woman who had been swimming in a lake with family members when she failed to return to the surface.
Lifeguards were called in and searched for the woman but were unable to locate her.
The OPP Underwater Search and Recovery Unit has now been called in to assist the investigation.
Logos Land Resort says the resort will be closed to the public until the police investigation is complete.