Pictures show the state of a gym and industrial unit destroyed by a fire in Treforest walesonline.co.uk - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from walesonline.co.uk Daily Mail and Mail on Sunday newspapers.
Police have declared a major incident after the blast inside the large building housing Mindset Gym at Treforest Industrial Estate in Pontypridd, which is on the brink of collapse.
Residents in and around Treforest, south Wales, shared their worry after noticing flames and thick, black smoke billow from an industrial building on Wednesday evening