A woman has died after a vehicle rollover on Highway 404 in Richmond Hill Sunday morning.

Police responded around 9:30 a.m. to the highway’s southbound lanes.

OPP tells CTV News that the 41-year-old woman from Oakville, was driving a Honda CRV and struck a Suzuki sedan, sending her into the centre ditch.

The driver of the Suzuki, which also ended up in the ditch, was not injured.

Police are still investigating what caused the crash.

The southbound lanes of Highway 404 near Stouffville Road have been re-opened after the investigation.