Perth traffic: Major emergency as three injured after car rolls in collision in Coogee

A major emergency is underway south of Perth after a car rolled in a collision.

Three people have been injured in the crash, which unfolded about 5.40am at the intersection of Cockburn Road and Mayor Road in Coogee.

Each of the injured patients were men in their 50s with three St John Ambulance crews responding to the incident.

The most seriously injured man was rushed to Royal Perth Hospital under normal road conditions, while the others were taken to Fiona Stanley Hospital.

Traffic remains slow in the area and drivers are warned to drive with additional caution, particularly in the wet conditions.

It is shaping up to be a chaotic morning on Perth roads.

Another crash has halted traffic in Oakford, south east of the city, after two cars collided.

St John Ambulance and DFES were called to the scene.

Police say both drivers had minor injuries and had been able to get out of their vehicles.

A crash on Kwinana Freeway southbound on Mt Henry Bridge at Salter Point has reduced traffic to a single lane.

Traffic is heavy on approach.