A one-year-old boy was shot to death in his stroller after gunmen opened fire at a barbecue in Brooklyn, New York.
Three other adults were also injured in the attack in Bedford Stuyvesant at 11.30pm on Sunday, but are expected to survive.
Witnesses said two men jumped out of a car and fired multiple shots at a group before driving away.
The killing came amid a bloody weekend of gun violence in New York, with 16 people shot in 11 incidents on July 12.
Police said the infant, who was named in US reports as Davell Gardner, was hit in the stomach while sitting in a buggy.
He was treated at the scene but later died in hospital.
Three men also sustained gunshot injuries in the incident. A 27-year-old was shot in the ankle, a 35-year-old was shot in the groin and a 36-year-old man was shot in the leg.
New York Police Department chief Jeffrey Maddrey tweeted: "The baby was with his family enjoying a Sunday night in the Summer when someone started shooting.
"Three people were injured and the baby was killed.
"This. Must.STOP! We as a community, we as a police department denounce this disgusting violence."
NYPD Commissioner Dermot Shea said: "Last night, 4 people were shot at a Brooklyn cookout, including a 1-year-old child who died from his injuries. These are the very real people affected by senseless gun violence. Anyone with information about this incident, or any crime in NYC call @NYPDTips".
