Image may contain: Art, Painting, Countryside, Hill, Mountain, Outdoors, Nature, Slope

Pen Y Fan has been closed to the public ‘until further notice’

Witnesses report a large number of police officers at the scene

This morning police cordoned off one area of Pen Y Fan mountain via the access point at the Pont ar Daf car park after a "multi-agency incident".

Eyewitnesses have reported seeing many police officials, a search helicopter and a mountain rescue team at the foot of the mountain.

The National Trust have stated that there is "no access to Pen Y Fan until further notice".

Dyfed-Powys Police have said it is not a training exercise and more details will be given as the investigation progresses.

This is part of a search for a missing person which has been categorised as a "Multi-Agency Incident" in a tweet by the South Wales Police Operations account.