Smoke billowed through West Mackay on Thursday night as fire fighters fought a large fire.
The alarm was raised around 8pm with 12 crews at the scene at the height of the blaze.
It was contained within two hours of emergency services arriving.
Part of the 20×40 metre industrial shed’s roof collapsed, nobody was inside at the time.
At this stage, it is being treated as suspicious and a fire investigator will return on Friday morning to try determine the cause.