A second multi-vehicle accident has taken place on the A34 southbound.
Queues are forming after the crash which happened between the Marcham interchange near Abingdon and the Milton interchange.
The accident happened at around 5.40pm, a mile after the Marcham interchange, with four vehicles thought to be involved.
Earlier this afternoon a crash caused serious delays for drivers on the southbound carriageway between the Milton and Chilton interchanges near Didcot.
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