Detectives investigating two farm building fires believe the blazes are linked.
The derelict sites, near New Pitsligo in Aberdeenshire, have been targeted over the summer.
The first incident, at Whitehill Farm, Middlemuir, was reported on Wednesday, June 17, and happened between 7pm and 11pm.
The second took place around half-a-mile away at Whitehill Croft, Middlemuir, on Monday, August 3, between 6pm and 9pm.
Nobody was injured on either occasion, but the buildings were extensively damaged.
Both fires were started deliberately and investigating officers are treating them as linked.
Detective constable Keith Rennie, of Ellon CID, said: “Our enquiries into both of these incidents are ongoing and we would urge anyone with information to come forward.
“We would be especially keen to speak to any motorists, including anyone with dashcam footage, who has been travelling on the B9093 between Strichen and New Pitsligo and the unclassified road passing Middlemuir, New Pitsligo, within these times which would directly pass both buildings.”
If you have any information, call 101 or Crimestoppers anonymously on 0800 555 111.