Update: All city-bound lanes have re-opened.

All city-bound lanes have been closed on the Monash Freeway following a serious collision near Huntingdale Road.

The Department of Transport (DoT) says emergency services are on-site and are expected to remain in place throughout the afternoon peak.

Motorists are advised to exit the freeway at their earliest convenience. DoT recommends exiting at EastLink, Police Road, Wellington Road or Blackburn Road and using Princes Highway and Dandenong Road as alternate routes.

Extensive delays are also building up on the Monash Freeway’s outbound lanes.

7News reports the accident involved a truck and a single vehicle.

Head to traffic.vicroads.gov.au for traffic updates.