A man has been killed and two others have been injured during a tense shooting stand-off on the NSW Central Coast.

The alleged gunman is facing 13 charges, including murder

The alleged gunman is facing 13 charges, including murder A police officer injured his back trying to help the shooting victim

A police officer injured his back trying to help the shooting victim Police said officers did not fire shots during the incident

Tactical officers and police negotiators were called to Cutler Drive at Wyong about 6:00pm yesterday, after reports of a disturbance.

Video of the stand-off shows police officers with their handguns drawn stationed in a perimeter outside the suburban home as three gunshots are fired.

The alleged gunman was arrested at the home just over an hour later, at 7:15pm.

Tactical police and specialist negotiators arrested the alleged gunman after more than an hour. ( ABC News )

Police found the body of a 20-year-old Watanobbi man at a home in nearby Maple Circle.

A 45-year-old woman and a 50-year-old man were taken to hospital with minor injuries.

NSW Police said no police firearms were discharged during the shooting but a police officer injured his back while trying to assist the dead man.

A police officer injured his back while helping a 20-year-old man killed in the stand-off. ( ABC News )

The alleged shooter, Bradley White, was taken to Wyong Police Station where he was charged with murder, two counts of shooting with intent to murder and possessing a firearm.

The 40-year-old was refused bail when he briefly faced Wyong Local Court this morning.