 Shortly after the Goldenberg incident, Mitterrand assigned Christian Prouteau, head of the elite National Gendarmerie Intervention Group ("Groupe d'Intervention de la Gendarmerie Nationale" – GIGN), to organise the establishment of a 'Mission of coordination, information and action against terrorism' (later simply called the 'anti-terrorist cell'), to operate in secret and to report directly to the office of the President (police and security services would normally fall under the responsibilities of the Minister of the Interior).On 28 August, the cell requested the arrest of three activists linked to the Irish nationalist movement via their association with the Irish Republican Socialist Party (IRSP) and its paramilitary wing, the Irish National Liberation Army (INLA).The three people—Stephen King, Michael Plunkett and Plunkett's girlfriend, Mary Reid—were arrested in an apartment (inhabited by Plunkett, Reid and their child) on the Rue Diderot in Vincennes, in which three handguns and a small amount of explosive were found.