Multi-vehicle accident on 403

A multi-vehicle accident is tying up westbound traffic on Highway 403 between Hamilton and Brantford.

The westbound lanes of the 403 are closed between Highway 52 and Sunnyridge Road.

Provincial police say at least one person has been seriously injured and there has been a fuel spill.

Eastbound traffic is also backed up because of the crash.

Police are not saying how long the closure will remain in effect.