Fri, 30 Dec 2011
The Celtic League believe a graffiti attack at Hango Hill may have been deliberately timed to coincide with the Illiam Dhone Commemoration.
A crude drawing was spray painted on the historic monument sometime around Christmas Eve.
Nationalists are due to gather at the site for the annual commemorative service on Monday.
The group says it's unclear if the vandalism is anti-nationalist but suspects the timing may be deliberate.
It accuses the police and media of being low-key over the event, unlike when anti-colonial slogans were daubed around the Isle of Man by nationalists two years ago.
The Celtic League says if this latest attack is anti-nationalist, it marks a new twist in political agitation in Mann.
The motives of the vandal aren't known, but it hasn't previously been thought to be politically motivated.