The graffiti was daubed on a wall in the Great Northern Road area of the town and references the Kingsmill atrocity, in which 10 workmen were killed in South Armagh in 1976. Mr Donnelly said anyone with information should come forward immediately.
“This graffiti is utterly disgusting, especially given how the anniversary of the Kingsmill massacre and victims issues more widely have recently been under the spotlight. The memories of the victims deserve more than to be mocked in this manner
“Part of it is also designed to intimidate a particular section of our community. That must be condemned in the strongest possible terms – Omagh is a welcoming place and those behind this graffiti speak for no-one.
“I would appeal to anyone with information on this repulsive incident to contact police with it immediately.”