A young baby has been airlifted to hospital following a fatal collision on the M40 earlier today.
Emergency services remain at the scene and motorists are advised to avoid the area if possible.
Police were called at 11.20am this morning, Friday, to reports of a collision on the southbound carriageway of the M40, just before junction 9 between a green Peugeot 406 estate and a red arctic lorry.
The driver of the Peugeot, a woman in her late twenties, was pronounced dead at the scene.
A young baby, believed to be only a few weeks old and in the rear of the vehicle, has been airlifted to hospital for treatment.
It is not believed the baby is injured however she remains at hospital as a precaution.
Two lanes of the southbound carriageway have now been reopened however there remain lengthy tailbacks and motorists are advised to avoid the area. Many arterial routes have also been affected.
According to the Highways Agency website, there are delays of 50 minutes on the A34 northbound between the junctions with the A420 and M40.
Anyone who witnessed the collision or has any information which may help officers with their investigation should contact police via the non-emergency Police Enquiry Centre on 101, quoting URN 559 13/6 or Crimestoppers anonymously on 0800 555 111.