Police are investigating the stabbing death of a young man in western Sydney overnight.

Events began about 10.10pm yesterday when emergency services were called to a bus interchange on North Parade at Mount Druitt.

Police found two men – both aged 19 – suffering from stab wounds.

One of the men sustained stab wounds to his chest and was treated by paramedics at the scene; but he could not be saved.

The other victim was treated at the scene for wounds to his arm before being taken to hospital in a stable condition.

A crime scene has been established and officers, including the State Crime Command’s Homicide Squad, are investigating the death

A report will be prepared for the coroner.