An early morning crash has closed southbound lanes on the Kwinana Freeway.
UPDATE at 5.50am: Crash cleared, all lanes reopened
Mainroads have confirmed a crash on Kwinana Freeway southbound at Karnup Road near Karnup.
It's believed a car crossed the median strip, hit another car and then rolled.
As a result of the crash all southbound lanes have been closed.
Traffic is being diverted at Karnup Road.
One person is believed to be injured, but the injuries do not appear to be life threatening.
Emergency crews are on site.
Motorists are urged to use caution on the roads.