A WOMAN from Cwmbran was seriously injured in the early hours of this morning after a car overturned on the M48 between Chepstow and the M4 interchange near Magor.

And a man from Newport has been arrested over suspected dangerous driving and drug-driving offences arising from the incident.

Gwent Police were called shortly after midnight to a collision involving two vehicles in the M48's westbound carriageway, between junction two, for the A466 Wye Valley Link Road at Chepstow, and junction 23 of the M4.

A Kia Picanto car had overturned as a result.

The woman, 24, was taken to the University Hospital of Wales in Cardiff, for treatment.

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The road was closed for around seven hours for recovery work to be carried out. and reopened shortly after 7.10am.

"A 29-year-old man from Newport has been arrested on suspicion of causing serious injury by dangerous driving and driving a motor vehicle with a proportion of a specified controlled drug above the specific limit," said a Gwent Police spokeswoman.

"He has been released under investigation."

Anyone with any information or dash-cam footage is asked to telephone Gwent Police on 101 quoting reference number 2000346784. Alternatively, send a direct message via the force's Twitter and Facebook pages.