Officers from the Orillia detachment of the Ontario Provincial Police (OPP) are looking for a missing man who went fishing in the Bass Lake area and did not return at the scheduled time.
The OPP later located an abandoned boat in the area.
The OPP Marine Unit, OPP Aviation Services and Underwater Search and Recovery Unit (USRU) are assisting in the search.
Shoreline property owners in the Bass Lake area are encouraged to search their property water line.
Anyone with information is asked to contact the OPP at 1-888-310-1122.