Police are investigating a reported act of arson at Ewanrigg Farm, Maryport.
The incident occurred at around 4pm on Friday December 18 2020.
Extensive damage has been caused to the roof of an outbuilding.
A group of children were reported as, in the area when the fire service arrived, and police would like to speak to them to help with their investigation.
A spokesman for the police said: “Acts of arson are not only illegal, but it is incredibly dangerous and also devastating for the victims.
“We would urge anyone to come forward with information that could help with our enquiries.”
Anyone with information should contact PC 2899 Carter on 101 or call CrimeStoppers, anonymously, on 0800 555 111.