Environment Canada has issued a fog advisory for parts of central and southern Saskatchewan.

The advisory includes Regina, Lloydminster, Moose Jaw and Estevan.

The weather agency says that the dense fog has caused zero visibility in some areas. Visibility is expected to improve later on Saturday, but foggy conditions will last into Sunday morning.

The Saskatchewan Ministry of Highways is also reporting foggy conditions on highways throughout the province. Motorists are being reminded to slow down and drive for conditions.