A young man is set to face a NSW court charged with murder after an alleged fatal stabbing in Sydney's west, police say.
Two other young men will also face Parramatta Local Court on Friday on charges relating to the alleged stabbing of three men in Whalan, NSW police said on Friday.
Emergency services found three men with stab wounds at a reserve in Whalan on Wednesday night.
One man, aged 40, died at the scene. Two others, aged 25 and 19, were taken to hospital - where they remained on Friday.
All three victims were known to each other, police said.
Officers have charged a fourth man, aged 18, with murder, wounding with intent to cause grievous bodily harm and affray.
He was refused bail and is due to face court on Friday.
Two 19-year-olds were also charged and refused bail ahead of a court appearance on Friday.
One of them faces a charge of affray, the other was charged with accessory after the fact to murder, affray and fail to comply with a form of demand.