Drivers are being forced to go slow following a four-vehicle crash on the M40 near Bicester.
The accident happened about 8am on the southbound carriageway, between junction 10 at Ardley and junction nine at Bicester.
One lane is blocked and there is queueing traffic tailing back to junction 11 at Banbury.
Four vehicles in lane three were involved in the crash near junction 10, and Highways Agency staff are now at the scene.
No one from South Central Ambulance was available for comment.
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