A rights group says prosecutors have offended Holocaust victims by exonerating a Romanian mayor who was investigated for wearing a swastika in public.

Radu Mazare, mayor of the Black Sea city of Constanta, goose-stepped on stage in a World War II German army uniform with a swastika at a July 2009 fashion show.

The Center for Monitoring and Combating Anti-Semitism says Wednesday the decision not to prosecute him "deeply offends the memory of the Holocaust victims killed by people dressed in the same uniform."

It is illegal to display swastikas in Romania.

Mazare later expressed regret for his actions and denied being a fascist or an anti-Semitic. Prosecutors who investigated Mazare closed his case Tuesday.