The OPP are warning snowmobilers to use caution if they chose to travel on frozen waterways.
This, after an incident Saturday on Georgian Bay in the Penetanguishene area.
A male sledder was ejected from a machine after hitting a large pressure crack.
OPP say he was injured and required hospital treatment.
The pressure ridge extends from Coutnac Beach to Marygrove Camp and police say they've heard from local residents that other snowmobilers have struck the same pressure crack.
