Fire crews from Llantwit Major, Cowbridge and Bridgend are dealing with a fire at the Vale Business Park in Llandow.
South Wales Fire and Rescue Service has confirmed that there is no asbestos within the building, but they are asking people to keep their windows and doors closed.
More top news
Three South Wales police officers face allegations of misconduct regarding paedophile and former Lost Prophets singer Ian Watkins
A football-loving Welsh couple set off to see the Euros in Lille - but ended up in the wrong Lille more than a hundred miles away.
While Belgium fans will heavily outnumber their Welsh counterparts in Lille, Wales know that they are unbeaten in the last three meetings.