The OPP's Underwater Search and Recovery Unit is expected to arrive on the scene today to help locate a 24 year old Winnipeg man.
Police say two men were thrown into Gunn Lake, just south of Minaki Saturday evening around 8:00 after encountering high waves.
Neither man was wearing a life-jacket.
Eyewitnesses were able to rescue a 23 year old man from the lake, but his companion is still missing.