A section of a main road in Oxfordshire has been closed. 

The A41 near Bicester has been closed near Blackthorn Road and it is understood the road has been closed since at least 10am today.

The road runs between Bicester and Aylesbury. 

The road is shut according to the AAThe road is shut according to the AA (Image: AA)One eyewitness said "all three emergency services" passed them this morning. 

It is not yet known why the road is shut.

Thames Valley Police has been contacted for more information.