All Highway 400 southbound lanes have reopened at Innisfil Beach Road following a collision but police say only one lane is open at the scene of the collision at 4th Line.
The northbound lanes between Highway 89 and Innisfil opened at around 10 p.m.
The OPP said six vehicles were involved in the collision on Wednesday just before noon. At least one person was seriously hurt and an air ambulance was called in.
More to come