About a dozen semis hit the ditch and at least six other vehicles rolled over amid extremely icy conditions on a major highway in west-central Saskatchewan.

RCMP say no injuries have been reported after the slew of accidents, which happened on Highway 16 between North Battleford and Lloydminster on Wednesday.

Eastbound traffic was down to one lane for several hours on Highway 16, about eight kilometres east of Maidstone.

While road conditions are slowly improving, Mounties are warning motorists to drive with extreme caution.