A section of Highway 11 just north of Englehart is closed after two tractor-trailers collided Monday around 7:00am.
OPP closed the highway because one of the rigs is leaking fuel and a cleanup is underway.
Investigators say the big trucks were approaching each other from opposite directions when they ran into one another.
Police have set up a detour for northbound traffic.
From Highway 11 North, take Highway 65 west and drive west from Temiskaming Shores and continue to Elk Lake.
Afterward, take Highway 66 east and head back to Highway 11.
Police have not said if anyone was hurt.
