06/10/2012 11:53 EDT | Updated 08/10/2012 05:12 EDT

Woman killed in Highway 400 crash

Ontario Provincial Police are investigating a deadly rollover on Highway 400.

The crash occurred Saturday night in the southbound lanes near Mount St. Louis Road.

A woman was killed and two other people were left in hospital.

Police have not released the name of the deceased.

OPP are looking to speak with anyone who witnessed the crash.