A MAIN road from Didcot to Wantage has been blocked off by an ambulance this morning.
*UPDATE*: Read our story here.
Motorists have warned on social media that the A417 is closed, just past the Ardington turning.
One person speculated that there had been a crash between a cyclist and car.
Others said they had seen an air ambulance circling the skies.
Highways England traffic feed shows gridlock and slow-moving traffic in the area.
South Central Ambulance Service has been asked to comment.
Thames Valley Police refuse to comment on road traffic collisions.
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