Police have closed a main A-road in Oxfordshire for investigation work after a "serious" crash.

Emergency services were called to the A40 between the Swinbrook junction and Burford at around 6.40am this morning (March 4) after a two-vehicle crash.

The road is expected to remain closed in both directions "for some hours".

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A Thames Valley Police statement said: "The A40 between the Swinbrook junction and Burford, after the Asthall roundabout is currently closed in both directions due to a serious two-vehicle road traffic collision.

"It is likely to remain closed for some time.

"Please find alternative routes if you can."

An AA update reads: "Road closed due to crash investigation work on A40 both ways between B4020 Shilton Road and The Swinbrook turn off.

"The incident occurred roughly half a mile east from the Burford Roundabout and has been ongoing since 6.40am."