Gwent Police confirm a male motorcyclist has died following a collision on the Second Severn Crossing.
A police spokesperson said the force received a report at 5.50pm.
The M4 remains closed at Junction 23 eastbound, with traffic being diverted.
More top news
Three teenagers and a 43-year-old man have been arrested on suspicion of murder and remain in custody.
Organisers say the move is due to "unprecedented demand".
The wintry snap we enjoyed last week now seems like a dim and distant memory,as we return to dull, damp and mild conditions!