The Piazza Fontana bombing was a terrorist attack that occurred on 12 December 1969 when a bomb exploded at the headquarters of Banca Nazionale dell'Agricoltura in Piazza Fontana in Milan, Italy, killing 17 people and wounding 88. The same afternoon, another bomb exploded in a bank in Rome, and another was found unexploded in the Tomb of the Unknown Soldier. The attack was carried out by the Third Position, neo-fascist paramilitary terrorist group Ordine Nuovo, and possibly undetermined collaborators.