Police are searching for a ute or trailer after a cyclist was injured when he hit two pieces of concrete in a cycling lane in Nelson.

The cyclist struck the concrete at about 10.30 this morning near a truck-stop on Haven Rd, Beachville.

After hitting the concrete the cyclist fell from his bike. He was taken to hospital to be treated for his injuries.

Police believe the concrete came from a ute or vehicle with a trailer, heading east on Haven Rd.