Police are appealing for information about a possible arson attack near Lichfield.
The blaze at an empty factory on the Bonehill Industrial Estate in Fazeley started at around 10.30pm on April 23.
Police and fire investigators believe it may have been started deliberately and are appealing for anyone with information to contact them.
A number of young people were spotted close to scene at the time of the blaze and police are appealing for them to come forward so they can be eliminated from enquiries.
Anyone with information is asked to contact Detective Sergeant Chris Douglas at Tamworth CID, telephone 0300 123 44 55 or, call Crimestoppers, anonymously, on 0800 555 111.