A 65-year-old woman is being treated for leg injuries after a serious crash.
Police were called to a crash involving two cars on the main road between Rogiet and Undy at around 11.25am on Thursday. (March 19)
Gwent Police said the crash involved a silver Peugoet 308 and a red Toyota Yaris.
A police spokesman said: "A 65-year-old woman is receiving treatment at the scene after sustaining an injury to her upper leg."
Officers from Gwent Police remain at the scene, along with officers from the South Wales Fire and Rescue Service and the Welsh Ambulance Service.
The road remains closed in both directions.
A local resident described it as an "accident blackspot".
He said: "There are always cars going through the fence."
A spokesperson for South Wales Fire and Rescue Service has confirmed that crews from Chepstow, Malpas and Caldicot station attended the scene.
Newport Bus has also confirmed that the X74 service has been affected.
Anyone who may have witnessed this incident, or has dashcam footage, can contact Gwent Police on 101, quoting log reference 105 19/03/20.
You can also contact the force via social media on Facebook and Twitter.
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