The A40 between the Scotchwell Roundabout and Canaston Bridge has been closed both ways due to accident between a car and a lorry.
Emergency services are currently in attendance. The accident is believed to have happened near Slebech.
There are reports that traffic is building steadily in Haverfordwest around the closure at the Scotchwell Roundabout.
The Western Telegraph will bring you updates as we have them.