Lorry overturns on busy A40 roundabout in Carmarthenshire - live updates
A lorry has overturned on a busy roundabout on the A40 in Carmarthenshire.
Traffic Wales says the accident has happened on the Whitland east roundabout, and that the road is closed in both directions.
A statement adds: "Avoid the area if possible."
Traffic monitors from the area are showing heavy congestion.
It is particularly affecting traffic between Narberth and St Clears.