Police officers have shot a man who allegedly lunged at them with a knife outside Campbelltown train station.
Officers had been speaking with a man on Hurley Street just before 2.45pm on Wednesday when an altercation occurred.
Police used a taster on the man, however he allegedly continued to threaten them.
He was then shot in his stomach area.
Paramedics were called to the site and treated a man, aged in his 30s, for a gunshot wound.
He was transferred to Liverpool Hospital.
His condition remains unknown.
A crime scene was established outside the station. Officers encourage people to avoid the area this afternoon while the scene is examined.
Police have launched a critical incident investigation into the shooting.
Police are not searching for anyone else in relation to this afternoon's incident. No officers or any other members of the public were injured.
A Transport Management Centre spokesman said trains were running as normal on the T8 Airport and South Line.
"Buses are operating as normal, except the bus stop location has been moved slightly further away from the normal site," he said.
"Staff are there to direct customers."