PART of the A420 is closed this morning after a 'serious' crash between two vehicles. 

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The crash happened at around 4.50am this morning at the junction of Besselsleigh Lane, near Cumnor.

The road is now closed in both directions near the Greyhound Pub to the junction.

It was expected to reopen at 11am, but our traffic feed says the road is still closed.

A Thames Valley Police spokesperson confirmed there have been some 'serious injuries'. 

South Central Ambulance service said they were called to the crash, but the investigation is now being led by Thames Valley Police. 

One driver who approached the scene at about 6.20am said he saw a 'number of police cars' just beyond The Greyhound pub, before being diverted off.

We are expecting updates throughout the day - check our live traffic feed here.