All southbound lanes of the M7 are closed in Eastern Creek.
The closure is due to a multi-vehicle crash near the Wallgrove Road on-ramp.
Motorists are advised to avoid the area.
Motorists already in the area can exit at the Great Western Highway.
Traffic is already very heavy.
Motorists should allow plenty of extra travel time and expect significant delays.
All northbound lanes are open, however motorists are slowing down as they pass the site.
Emergency services are on site and motorway crews are on their way.