Police Scotland officers are investigating a wilful fireraising committed at Kinnaber woods on Friday, May 13.
The persons responsible set fire to a tree and undergrowth shortly before 7pm at the woods on the outskirts of Montrose.
A large group of youths fled the area prior to the arrival of the Scottish Fire and Rescue Service.
They are believed to be aged between 13 and 16 and reside locally.
If anyone has any information that would assist with this enquiry, please speak to a local officer or contact Police Scotland on 101.