Update: The incident has resolved and the road has returned to normal.
Original information below.
Motorists are being advised of long delays on the A483 near the Posthouse Roundabout this afternoon following a road traffic collision.
It is thought the incident, which took place at around 2:15pm, involved two vehicles.
Traffic is currently backing up from the Wales / England border towards the Posthouse Roundabout.
It is reported that delays are currently around half an hour.
More information when we have it.