A woman has been killed in a multi-vehicle crash on the M40 in Oxfordshire.

Emergency services were called to a serious collision at around 7.37am today (April 11) on the northbound carriageway between junction 11 (Banbury) and junction 12 (Gaydon).  

Despite the efforts of two off-duty police officers who performed CPR and the emergency services who arrived shortly after, a woman died at the scene.

READ MORE: Railway from Oxford to stay shut till June for emergency work on sinking bridge

There was also a minor crash on the southbound carriageway between the same junctions.

Detective sergeant Stephen Barr of the Serious Collision Investigation Team said: “This was a serious incident which has seen a woman tragically lose her life.

“We are conducting a full investigation and we are now asking for anyone who witnessed the incident, or who has dashcam footage, to please get in touch with us.

“Of particular interest to officers is any footage of a black Volkswagen Polo that was travelling northbound between junctions 11 and 12 between 7am and 7.37am this morning.

“Vehicles on the southbound carriageway were also affected by the collision as two cars heading southbound took evasive action, resulting in a further collision and we would appeal for any footage from those travelling southbound also."

Anyone with footage or information is asked to contact police by calling 101 or visiting www.warwickshire.police.uk/ro/report, citing incident 39 of April 11.