The body of a 30-year-old man was found near a bridge on one of Pembrokeshire's main roads early this (Friday) morning.
Police said that the man, who is local, was lying in the A477 close to the Sardis road bridge over the Kilgetty by-pass.
After the discovery was made at 5.15am, police temporarily closed the road, with traffic being redirected between the B4314 near Red Roses and the A478 at the Kilgetty roundabout.
A Dyfed-Powys police spokesman said: "At about 5.15am this morning, the body of a 30-year-old local man was found lying on the carriageway on the A477 near a bridge at the Kilgetty roundabout in Pembrokeshire.
"Dyfed-Powys Police has commenced an investigation into the death, which at this time is not believed to be suspicious, and are appealing for witnesses."
Anyone with further information is asked to contact police on 101.