A man has died after being shot by police during a siege on the New South Wales Central Coast overnight.

Officers went to a home on Wells Street in Springfield, east of Gosford, to check the welfare of a 49-year-old man just before 3:30pm on Wednesday.

NSW Police said specialist officers were called to the scene and a perimeter established after he armed himself with a screwdriver and other sharp objects.

The stand-off continued for almost six hours before the man allegedly attempted to burn an officer by lighting an aerosol can.

Police said officers from Tactical Operations Regional Support broke into the house before the man armed himself with a sharp object and stabbed at an officer multiple times.

Officers shot the man, who died at the scene.

A police officer received a minor injury as a result of the incident.

A critical incident team from State Crime Command’s Homicide Squad will lead an investigation into the circumstances surrounding the incident.

That investigation will be reviewed by the Professional Standards Command and overseen by the Law Enforcement Conduct Commission.