Police are appealing for witnesses after a crash left four people were injured after a motorists, who had already failed to stop for police, crashed into another vehicle whilst driving down the wrong way on the M1.
The crash happened near Wakefield last night (Monday 18th April) at around 9.10pm.
The black Skoda Fabia travelled south along the northbound carriageway and collided with a blue BMW 320 which was driving north between junctions 39 and 40.
The three occupants of the Skoda all suffered serious or life-threatening injuries.
The driver of the BMW also suffered serious injuries.
West Yorkshire Police has referred itself to watchdog the Independent Office for Police Conduct because the incident happened after police contact.
Anyone with information should call the force on 101.