A major incident has been declared in South Wales as roads were closed around an industrial estate after a “loud explosion” was heard before a “large fire” broke out.

South Wales Police said roads around Severn Road in Treforest are expected to remain closed for some time due to the “serious incident”.

Cllr Andrew Morgan said on X (Twitter) that “there is a significant fire on the Treforest Industrial Estate, emergency services are on the scene… please avoid the area”.

Rhondda Cynon Taf-based radio station GTFM reports that a listener had called in after hearing “a loud explosion which seems to have triggered a large fire”.

Wales online quoted witnesses as saying they heard a “massive bang” which shook houses, with one adding: “Must have been a big explosion.”

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