Updated: 01/11/2013 12:14 PM KSTP.com By: Jennie Olson
Freezing rain is coating roads in Minnesota with a thick layer of ice.
The National Weather Service issued an ice storm warning for parts of the Northland, including Cass, Beltrami and Koochiching counties.
The slick travel conditions have caused some school districts to cancel or delay classes Friday.
The Duluth News Tribune says Duluth, Ely, Hibbing and Chisholm schools are among those closed.
Icy roads caused three buses to go into ditches in the Mora area Friday morning and two buses were stuck on the ice, according to the Kanabec County Sheriff. No one was injured.
The highway department is out sanding the roads.
The Minnesota Department of Transportation is advising not to travel on Highways 113 and 108 near Waubun and Pelican Rapids because of icy conditions.
In the metro, a slippery spot in St. Paul is causing some traffic problems. A school bus slid into a car near the Catuga Bridge, but no injuries have been reported.
Freezing rain is expected to end later Friday with snow developing. Forecasters expect 3 to 7 inches of snow for northern St. Louis, northern Itasca and Koochiching counties.
The Associated Press Contributed to this Report.