NSW detectives have formed a strike force to investigate the "gutless" shooting of two men at a Sydney park where children were playing.
A 20-year-old man was fatally shot in the head and an 18-year-old man was wounded in the chest at Wetherill Park in western Sydney just after 5pm on Friday.
Police say the shooting was targeted and happened in the vicinity of a number of bystanders, including a family and young children.
"I was appalled that there were up to 10 people in the park at the time of the shooting; these are people who were going about their business, enjoying time together before Christmas," Detective Superintendent Peter Lennon said in a statement.
"It is unacceptable that these people have been put at risk in what is - in reality - an incident I'd describe as gutless and appalling."
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The survivor is in a stable condition at Liverpool Hospital.
Forensic officers are examining the area and investigators are seeking information on a vehicle and individuals that may have been involved in the shooting.
Police are calling on anyone with information to come forward.
"Detectives from Fairfield Local Area Command are being assisted by investigators from the State Crime Command's Homicide Squad, and interviewing witnesses; however, at this time we have no description of a vehicle or individuals," Det Supt Lennon said.
