Police are appealing for information following a fire at FCC Environment recycling at a Carlisle industrial estate.
Two portable cabins were alight at around 5.30pm on Monday, April 19 at the Willowholme Industrial Estate.
Anyone with information or who witnessed the incident is encouraged to contact police on 101, referring to incident 159 of April 19.
Alternatively, call charity Crimestoppers anonymously, on 0800 555 111.