All westbound lanes of the M5 East are closed, causing traffic to queue back to the Sydney Harbour Tunnel, after a crash at Kingsgrove on Wednesday afternoon.

The crash - involving a car, a truck and a motorbike - unfolded just after 4.30pm.

The scene of the crash on the M5. Credit:Twitter: livetraffic

Traffic remained queued for more than 12 kilometres at 6.20pm.

One eastbound lane has also been closed near King Georges Road, with traffic backed up in that direction for more than 7 kilometres.