Major delays on Sydney Harbour Bridge after multi-vehicle crash

A multi-vehicle crash is causing significant delays for afternoon commuters on the Sydney Harbour Bridge.

The crash occurred on the Cahil Expressway, with traffic now being diverted over the bridge.

Southbound lanes of the Sydney Harbour Tunnel have reopened however motorists being advise to allow for extra travel time.

Heavy traffic has already begun to pile up over a kilometre from the crash site.

Emergency services and traffic crews are attending the scene of the crash.

More to come.