 The later bombing, known as the Piazza Fontana bombing of 12 December 1969, killed 16 and injured 90.Communist Secretary Luigi Longo suffered a stroke in late 1968; although partially recovering in the following months, from February 1969 he was assisted in most decisions by Enrico Berlinguer acting as cive-secretary.Longo resigned the position of party secretary in 1972, supporting the choice of Berlinguer as his successor.