Ontario Provincial Police say at least 24 people are in hospital, four with life-threatening injuries, following a bus crash in eastern Ontario.
Const. Suzanne Runciman says the bus was carrying approximately 37 people, including the driver and a tour guide.
Runciman says the bus went off Highway 401 and hit a rock cut between Brockville and Prescott.
The Ornge air ambulance service has said it is responding to the scene.
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— with files from The Canadian Press