Fifteen people were injured Saturday when a bus plowed through a wooded area near Slave Lake, Alta.

RCMP say the bus veered off Highway 2 between Edmonton and Slave Lake and came to a rest in a line of trees.

Six people were taken to hospital and others were treatedat the scene and released. Police said all injuries were minor.

The bus was en route to High Prairie, Alta. The company that operates it, Northern Express Bus Line Company, said the bus was leased from MPM Canada in Edmonton.

Police are investigating whether a mechanical problem caused the crash.

With files from CTV Edmonton and The Canadian Press