A fire broke out at a factory belonging to Edwards Coaches last Friday (20 January) in Rhondda Cynon Taf.
It appears that a roof had caught fire, says a South Wales Police spokeswoman.
Four fire crews were at the scene and an aerial platform from Cardiff Central helped tackle the blaze.
The fire was dealt with quickly and no staff were involved, Edwards tells routeone.
The cause of the fire is not yet known and a fire investigation is set to take place.