A 2,000 year old fort in Port Grenaugh has been left damaged by litter and a fire.
Manx National Heritage says the incident was reported by a member of the public at Cronk ny Merriu.
It says it's not the first time the area has been damaged, after a disposable barbecue left visible scars at the site when it almost sparked a wider fire.
MNH says it's illegal to damage ancient monuments, and is urging people to respect such sites.
Smartmeter alert problem now fixed, says Manx Utilities
Merchant Navy Day marked this week
Filipino festival planned for Laxey
Glen Maye requisition meeting scheduled
Viking longboat races today
Postal vote applications have to be in soon
Mum launches petition over university support