Police were called at 10.31am by members of the public concerned for the safety of a woman on the bridge near to Sainburys’ in Pontypridd.
The North and South bound carriageways of the A470 are closed at Pontypridd and members of the public are being diverted away from the area where possible.
Police negotiators are currently in attendance.
We advise motorist to avoid the area and to use alternative routes.
Let us know your views by tweeting @PoliceHour We'll feature the best tweets within the article.