Italian police are searching for a fugitive gunman who shot and killed four people in a working-class neighbourhood on the outskirts of Milan.
A two-and-a-half-year-old girl and a pensioner were among the victims.
He is accused of gunning down two men and in the process, killing the two bystanders.
Italian news reports identified the gunman as Vito Cosco, 27, of Crotone in Calabria.
Lt. Col. Angelo Rossi, of the Milan carabinieri office, told a press conference police were "actively" searching for Cosco and any accomplices.
"We are looking for the possible points of support in order to catch him and bring him to justice," he said.
He said Cosco had opened fire on the two men, identified by the ANSA news agency as Alessio Malmassari, 29, and Raffaele de Finis, 23, because of a "personal vendetta" against them.
The two men were sitting on a low wall on the street in Rozzano, on the periphery of Milan, when Cosco drove up in a car and opened fire, news reports said. One was killed immediately, and the other tried to run away. Cosco pursued him, and the bystanders were killed as he fired.