A crash has closed Highway 17 between Marathon and White River.
The highway is closed in both directions Thursday evening between Peninsula Road in Marathon and the Highway 631 junction in White River.
Provincial police said two passenger vehicles were involved in the collision, and the occupants have been taken to hospital.
The extent of injuries were unknown as of Thursday evening, police added.
The Ministry of Transportation's Ontario 511 online highway map said delays are to be expected and traffic control is in place.