Middlesex OPP are appealing to the public for information about a fatal collision just outside of Lucan.
Officers say two big rigs and a passenger vehicle crashed at Highway 23 and Fallon Drive at around 6:30 a.m. on Friday.
The passenger vehicle collided with a northbound big rig on Fallon Drive, and then a southbound tractor-trailer became involved in a secondary collision, police say.
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One person died as a result of the crash. Police identified the victim Friday afternoon as Erin McComb, 50, of Lucan.
The OPP says the roadway remains closed as investigators continue work at the scene.
Officers are asking anyone who witnessed the crash to contact Middlesex County OPP at 1-888-310-1122.