Sicilian separatist Salvatore Giuliano and his gang fired into a crowd of May Day marchers near Piana degli Albanesi, Sicily, killing 11 and wounding 33.

Salvatore Giuliano was a Sicilian brigand, who rose to prominence in the disorder that followed the Allied invasion of Sicily in 1943. In September of that year, Giuliano became an outlaw after shooting and killing a police officer who tried to arrest him for black market food smuggling, at a time when 70 per cent of Sicily's food supply was provided by the black market. He maintained a band of subordinates for most of his career. He was a flamboyant, high-profile criminal, attacking the police at least as often as they sought him. In addition, he was a local power-broker in Sicilian politics between 1945 and 1948, including his role as a nominal colonel for the Movement for the Independence of Sicily. He and his band were held legally responsible for the Portella della Ginestra massacre, though there is some doubt about their role in the numerous deaths which occurred.