The A40 is currently blocked near Llandeilo following a road traffic collision involving two cars.
The police and ambulance were called about 8.40am this morning and are currently at the scene.
A spokesperson from Dyfed-Powys Police said: "Police are in attendance at a two vehicle road traffic collision on the A40 at Manordeilo, near Llandeilo.
"The carriageway is currently blocked in both directions.
"Ambulance are also at scene. Recovery of both vehicles is required."
A female driver from one of the vehicles was conveyed to hospital with minor injuries.
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