UPDATE 4.22pm: Traffic remains slow on the A472, both ways from Crown roundabout, Pontllanfraith, to the Ystrad Mynach roundabout.

A CRASH has partially blocked the main A472 both ways at the Crown roundabout in Pontllanfraith.

Traffic is queuing both ways as a result, back to the Ystrad Mynach roundabout for eastbound vehicles, and to the Gelligroes roundabout for westbound vehicles.

The incident is affecting bus services, including Stagecoach service number 26.