Two people were killed in a horrific crash in the state's Great Southern yesterday morning.
The male driver and female passenger were both killed when the vehicle went down an embankment on Albany Highway about 10.30am.
Both were trapped in the vehicle and the RAC rescue helicopter was called to free the pair. It was later confirmed that both had died at the scene.
There are no further details on the ages of the deceased.
The crash occurred near Jellicoe Road in Kendenup, about 15 kilometres north of Mount Barker.
Police have advised that due to the crash there will be significant traffic delays in the area, near the intersection of Albany Highway and Jellicoe Road. These delays will be in place for a number of hours.
Police said Albany Highway has been closed in both directions. Lanes heading to Albany are fully closed, and minimal traffic has been allowed through in the Perth-bound lanes, which will be closed as needed for emergency response.
Main Roads WA is attending to manage traffic.
The deaths brings the state's holiday road toll for the year to four.