The Black Bloc anarchist group in Qena, Upper Egypt, has condemned 'defamatory photos' posted on the Facebook page of Al-Gamaa Al-Islamiya.
The newly formed group, which espouses the use of political violence to fulfill the goals of the January 25 Revolution, said photos of people 'making love' at a protest were not members of the Black Bloc, as was claimed by Al-Gamaa Al-Islamiya.
The photo was first published in a French magazine and was not taken in Egypt, Egyptian Popular Current member Hamada Alaa told the Al-Ahram Arabic website.
Black Bloc members have participated in recent protests in Cairo.
The group announced its formation in a YouTube video last week. It vowed to fight the "fascist" Muslim Brotherhood regime and warned the Interior Ministry not to intervene.
Al-Gamaa Al-Islamiya is an ultra-conservative Islamist group.