South Wales Police say that they are dealing with a major incident this evening.
A spokesperson for South Wales Police said:
We are at the scene of a serious incident on Severn Road, Treforest.
The roads around the area of Treforest Industrial Estate are currently closed and are expected to remain as such for some time.
Motorists are advised to avoid the area and use alternative routes where possible.
Updates will be provided when available and appropriate.