A woman has died after a car crashed into the central reservation on a motorway resulting in another crash.
The woman in her 30s was the passenger in an Audi which crashed on the M11 southbound near Harlow in Essex at 22:10 BST on Saturday.
She sustained multiple serious injuries and died in hospital.
The initial crash led to another involving a BMW and a VW Passat and possibly a fourth vehicle which police believe "left the scene".
Police were initially called to a report of an Audi hitting the central reservation on the southbound carriageway before a further crash with the other vehicles.
The southbound carriageway was closed overnight between junctions seven and eight.
Sgt Alex Black said: "This was a horrific collision which has had a tragic outcome and it's really important we're able to establish exactly what's happened."
Police are appealing for witnesses and dashcam footage.