04/07/2013 12:33 EDT | Updated 06/07/2013 05:12 EDT

Driver killed in rollover on Highway 401 ramp in Pickering

The Ontario Provincial Police are investigating a deadly crash that occurred overnight on a ramp leading off the westbound lanes of Highway 401 in Pickering, Ont.

An OPP news release says that a Toyota Corolla was on the off-ramp to Whites Road when it left the roadway, rolled and came to rest on the on-ramp to the westbound lanes of the highway.

Police say the crash occurred at approximately 11 p.m. on Saturday. The driver was pronounced dead at the scene.

The cause of the crash is not yet known.