Ontario Provincial Police are warning of the dangers of speed, alcohol and drugs, and riding on ice amid "Snowmobile Safety Week".
Superior East OPP Constable Ashley Nickle says the three are recurring causes or factors in snowmobile fatalities.
Nickle encourages snowmobilers to "make smart choices and use common sense to make sure that every ride is a safe ride".
Constable Nickle further recommends checking weather conditions before heading out, letting someone know where you'll be going and when you plan to return, carrying an emergency kit, wearing a helmet, and - if expecting to be on ice - carrying ice picks and wearing a floatation suit.