An East Lothian school was evacuated this week after a purposeful blaze was started in the building.
Emergency services had raced to Musselburgh Grammar School on Inveresk Road on Thursday (May 26) after reports were made of a fire.
Pupils and staff were reported to have been evacuated from the building as the fire was extinguished, with one source claiming the blaze was started "inside the pupils toilets".
READ MORE - Edinburgh carer struck off after failures caused vulnerable patient to choke
Police confirmed on Thursday they are now treating the incident as 'wilful', with no injuries coming as a result of the fire.
Sign up for Edinburgh Live newsletters for more headlines straight to your inbox
A Police Scotland spokesperson said: “Around 1.20pm on Thursday, 26 May, 2022, emergency services were called to a report of a fire at Musselburgh Grammar School, Inveresk Road, Musselburgh.
"No one was injured.
"The fire is being treated as wilful and officers are following a positive line of enquiry."
Edinburgh Live contacted the SFRS for comment.
