[1] It has been described by Italian intelligence sources as a horizontal structure of various anarchist groups, united in their beliefs in revolutionary armed action.

[18] In 2012 an official with the carabinieri ROS claimed that Italian intelligence had located the identities of at least fifty people belonging to the FAI, who are now in hiding.

"[23] In 2010, Italy’s postal service intercepted a threatening letter containing a bullet addressed to Prime Minister Silvio Berlusconi.

[24] A large envelope containing a letter addressed to Berlusconi with the threat “you will end up like a rat” was discovered on Friday in a post office in the Libate suburb of the northern city of Milan.

[27] On 31 March 2011, a mail bomb exploded at the Olten headquarters of Swissnuclear, the Swiss nuclear industry association, wounding two people.

[29] On 13 June 2012, the Italian ROS under the name 'Operation ‘Ardire’ conducted raids on forty people, arresting eight in Italy and sending two arrest warrants for individuals already incarcerated in Germany and Switzerland, Gabriel Pombo Da Silva and Marco Camenisch, as well as conducting multiple interrogations, some of which were in connection to Conspiracy of Fire Nuclei.

[33] The action was claimed by a group calling itself 'Olga Cell of the FAI/FRI' in a four-page communique sent to Italian daily newspaper Corriere della Sera.

[40][37] Although the Informal Anarchist Federation in Italy has existed for some time, in recent years several groups around the world have used the moniker to claim responsibility for their own attacks on government and corporate targets, including arson in Russia,[41][42] Argentina,[43][44] Indonesia[45] and the United Kingdom.

Torches in the Night – Earth Liberation Front claimed responsibility for setting fires that destroyed 5 luxury cars in the Bristol suburb of Long Ashton.

[19] The similarities in ideology between the Italian FAI and a Mexican group involved in a parcel bombing that seriously injured two nanotechnology researchers has been noted elsewhere.