Two people critically injured after car crashes into tree on Auckland's Southern motorway

Two people have been critically injured after a car crashed into a tree on Auckland's Southern Motorway this morning.

Source: 1 NEWS

Emergency services were called to the scene in Mount Wellington at around 8.20am, police said.

Two people have since been transported to Auckland Hospital. 

Two northbound lanes are blocked following the crash, and the Princes Street on-ramp has been closed.

Diversions are in place.

The serious crash unit is investigating.