Police appeal for witnesses after passenger seriously injured in crash on M1 between Wakefield and Dewsbury
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Officers from the roads policing unit would like to speak to anyone who saw a collision between a Ford Fiesta and a Vauxhall Corsa between junctions 39 and 40 southbound at about 8.29am.
The incident took place after the Corsa was in collision with the Fiesta, which had come to a stop due to a suspected tyre blow-out.
A female passenger in the Fiesta suffered serious injuries in the incident and was taken by ambulance to hospital for treatment.
Other people in the cars also received medical treatment.
A full closure was initially put in place on both sides of the M1 while ambulances attended.
The northbound carriageway was re-opened earlier today but southbound remained closed until early evening to allow investigation and recovery work to take place.
One lane is now open but three lanes remain closed.
Anyone who saw the collision or has footage of it is asked to contact the roads policing unit referencing log 438 of August 12.