Middlesex OPP are investigating a serious crash just north of Strathroy that left one woman with life-threatening injuries.

Just after 12:15 p.m. Sunday, a northbound vehicle on Hickory Drive slammed into an eastbound truck travelling on Egremont Drive.

A female in her 20s in the northbound vehicle suffered life-threatening injuries and had to be taken to a London hospital in an ambulance.

Police have since re-opened the intersection.

The investigation continues.