A previously unknown urban guerrilla group calling itself Militant Popular Revolutionary Forces has claimed responsibility for the murders of two Golden Dawn members on November 1.

Zougla.gr news website said that it received a phone call at 4.50 p.m. on Saturday in which the caller said a memory stick had been placed in an envelope that was left in a rubbish bag at the Kaisariani rifle range, where a monument to more than 200 Greeks executed by Nazi occupiers stands today.

The proclamation begins with a quote from José Buenaventura Durruti Dumange - a key figure in the Spanish anarchist movement in the 1920s and 30 - that claims no government truly wants to combat fascism.

The authors of the proclamation say that the two Golden Dawn members, 22-year-old Manolis Kapelonis and 26-year-old Giorgos Fountoulis, were killed in a “political execution” in revenge for the murder of rapper Pavlos Fyssas, who was stabbed to death by another supporter of the Neo-Nazi party, Giorgos Roupakias.

The proclamation also dedicates the murders to immigrants and says that the killings are just the start of the group’s campaign against Golden Dawn and its members.

Police did not immediately comment on the note’s authenticity.