UPDATE: 5.47pm

All lanes have now re-opened.

UPDATE: 4.56pm

A South Wales Fire and Rescue Service said they were called at 3.30pm. Crews cut one person who was trapped in a vehicle by removing the whole roof.

The person who was rescued by SWFRS is being taken to hospital. An air ambulance was also in attendance.

UPDATE: 4.37pm

The one lane which is closed is due to re-open at 7.30pm.

UPDATE: 4.14pm

A South Wales Ambulance spokeswoman said they are still at the scene.

4.08pm

FOUR people have been taken to hospital following a fire car crash on the M4 near Magor. The accident happened on the M4 westbound around 3.30pm between J23A Magor Services and J24 Coldra.

Lane one of three is closed.

A Gwent Police spokesman said the accident involved five vehicles and four people have been taken to hospital.