VANCOUVER -- Drivers were warned to expect "heavy delays" for hours due to a crash on Highway 1 near the border between Vancouver and Burnaby.

The Ministry of Transportation said the "vehicle incident" occurred in the westbound lanes just after the Grandview exit.

Emergency crews were at the scene, and the ministry urged those who rely on the route to "drive carefully," in a message posted on its DriveBC Twitter account.

A DriveBC post said the crash was blocking the HOV and left-most lanes. Drivers were asked to slow down and give first responders as much space as possible.

The crash was first reported on Twitter at around 8 a.m., and DriveBC said it was cleared shortly before noon, though delays were still possible.

Few details are known about what happened so far.

Two cars were seen at the site of the crash, one of which had a damaged windshield. Several cracks and a hole could be seen in the centre of the glass.

No damage was visible on the second vehicle. Emergency crews from both Vancouver and Burnaby were called to the scene.