The highway has reopened in both directions, according to OPP.
UPDATE 12:30 PM
OPP says a serious two-vehicle crash has closed Highway 11. It happened near Sand Dam Road. Highway 11 remains closed in both directions between North Bay and Marten River.
ORIGINAL STORY:
Highway 11 is closed from North Bay's Thibeault Hill to Highway 64 Marten River due to a collision, says Ontario 511.
The closure happened around 11 a.m. All lanes are closed.
OPP is on the scene.
Further details are unavailable at this time.