Traffic is queueing for ten miles after an accident earlier involving a bus, a van and a car on the M4 eastbound before J23A at Magor.
There is congestion to J27 (High Cross) and travel time is around 100 minutes.
All lanes have been re-opened. Only one lane had been open since the crash at 6.50am. The long queue will take a while to clear.
Police have launched an appeal for witnesses after a motorcyclist died yesterday near Magor.
The incident happened at approximately 1.45am on the A4810 near to the Tesco Distribution Centre. No other vehicles were involved.
Thirty-five-year-old Robert William Freeman, from the Bristol area, was taken to the Royal Gwent Hospital, but was pronounced dead on arrival.
Gwent Police is asking anyone with information to contact them on 101.
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The family of a man who was killed in a car crash in Monmouthshire say he will be "sadly missed".
55-year-old Nigel Williams, from Caerwent, died in hospital after a collision involving a car and a pedestrian on the A48.
It happened at approximately 3.30am on Saturday 5th November.
Mr Williams' family said he always had time for everyone.
Nigel Williams was a local man of Caerwent. He had three grown up children of which he was very proud. He always had time for everyone he met and was always ready to help with anything and everyone. He will be sadly missed.
Police are asking anyone with any information about the incident to come forward.
Good Morning Britain anchor Piers Morgan has taken issue with comments from Conservative MP for Monmouth David Davies.
Mr. Davies said that some of the 14 teenagers who arrived in the UK from the "Jungle" refugee camp in Calais on Monday did not "look like children".
Police are appealing for information after two men entered a house in Monmouth whilst pretending to be bailiffs.
It happened in the village of Llandewi Rhydderch sometime between 12:00pm and 10:00pm on the 25 August.
On entering the property, the pair took items from the address and left in a van.
The men, described as white and in their 40s, were wearing smart black clothing with high viz jackets and local accents.
Police say one was of a bigger build, 6ft1 in height with ginger balding hair, the other was of a slight build and was shorter with shaved dark hair.
A 28-year-old man who police described as a "potential risk to the public" has been found, after absconding from a psychiatric hospital.
Keiron Miller went missing from Llanarth Court Psychiatric Hospital in Monmouthshire on Friday morning.
Police have confirmed he was found on Sunday afternoon by police in Abergavenny and has been returned to his hospital ward.
Police are appealing for information after a break-in at a garage in Monmouthshire.
Officers say it happened sometime between 7.00am and 7.40pm on the 7th September, on Court House Road, Llanvair Discoed.
Five green army type sleeping bags and a camouflage vest were stolen, along with a metal statue of a soldier.
Anyone with any information is asked to come forward.
Police are appealing for help to find a man they believe is "a potential risk to the public".
28-year-old Keiron Miller absconded from Llanarth Court Psychiatric Hospital in Abergavenny just before 10am on Friday.
He was an involuntary patient under section 37 Mental Health Act, and is believed to have links to Barry near Cardiff.
He's described as 5ft 10 tall, slim, and has brown hair.
Officers say Mr Miller may be a potential risk to the public, because he is no longer in the custody of the psychiatric hospital.
Anyone who sees him is asked not to approach him but to call police.