Man stabbed in Sydney's southwest

A man has been stabbed while trying to break up a fight in Sydney's southwest.

At about 12.30am on Sunday police and emergency services were called to O'Brian Road in Mt Annan to find a 40-year-old man with stab wounds.

Police say initial investigations suggest he tried to break up a fight at a neighbour's home and was stabbed before a number of people ran from the scene.

He was treated by ambulance paramedics before being taken to Liverpool Hospital with non-life-threatening injuries.

Police are urging anyone with information to come forward.