Last updated: Sunday January 15th, 2:50pm
OPP continue to investigate a three-vehicle crash on Highway 401, west of Essex County Road 77.
It happened around 4:35pm in the westbound lanes.
Police say that a tractor-trailer, a pickup truck and a third small passenger vehicle all travelling westbound were involved.
The male drivers of the tractor-trailer and the pickup truck were treated for minor injuries. The female driver of the passenger vehicle was taken to an area hospital with serious but non-life threatening injuries.
The 401 was closed for several hours as police investigated.