One person has died after an accident at the entrance of the Brynglas Tunnels this morning.
Gwent Police say the driver, a 67-year-old man from the Cardiff area, was pronounced dead at the scene.
The accident involved one vehicle, which collided with a wall and an electrical sub-station.
Police say work to recover the vehicle and debris has now been completed and the Eastbound M4 has reopened but congestion remains very heavy in the area.
Anyone who may have witnessed the collision is asked to contact Gwent Police by dialling 101.
More top news
A dry night with clear skies, but it will be followed by a really rather beautiful weekend!
Former Wales rugby captain Gareth Thomas in bid to make indecent and homophobic chanting illegal.
Police seized around 10 kilos of class A drugs, cash, five vehicles and drug paraphernalia at four addresses in Bridgend.