Police are investigating a stabbing in Riverwood earlier today.
Shortly before 2.30am Campsie police were called to a home on Bonds Road, after reports a man had been stabbed.
When they arrived they found a man, 33, with a stab wound to his thigh.
He was treated at the scene by paramedics before being taken to St George Hospital where he remains in a serious condition.
Police believe the victim was stabbed after an altercation with another man known to him.
No arrests have been made.
Police are urging anyone who may have witnessed the incident to contact Crime Stoppers on 1800 333 000.