A Perthshire road was closed after 150 bales of straw were set alight.
The blaze started at 11.40pm on Tuesday night near Murthly and has left the A984 shut to traffic from its junction with the B9099 at Caputh to its junction with the A93 at Meiklour due to smoke drifting across the carriageway.
This is second such incident to take place recently following 200 bales of straw that were set alight last month at Kilgraston Mains Farm, Bridge of Earn.
Firefighters eventually managed to bring the fires under control at the Murthly incident around 3.55am, but Perth and Kinross Council has issued a notice stating “there is a likelihood of danger” and the road remains shut.
A spokesperson from Perth and Kinross Council’s roads network management said: “Bales of straw were set on fire, and the road was closed because of smoke going across the carriageway.
“It will be up to the police to decide if they are treating this as malicious.”
And a spokesperson for Scottish Fire and Rescue added: “Around 150 bales of straw were set on fire. We put the fires out at 3.55am.
“Three jets were used in the operation which saw two units from Blairgowrie attend.”
Police Scotland’s Tayside Division confirmed officers are carrying out enquiries after “approximately 150 bales of hay were found alight” in Murthly at 11.40pm on Tuesday.
Anyone who witnessed anything suspicious should phone Police Scotland on 101.