Three men stabbed in Sydney fight

A brawl involving up to six people in Sydney's CBD has left three men in hospital with stab wounds.

Emergency services were called to China Town about 1.30am on Tuesday where they found a man with stab wounds following reports of a fight between two groups.

He was taken to the Royal Prince Alfred Hospital where he remains in a stable condition.

Meanwhile, two other men believed to be involved in the fight presented themselves at St Vincent's Hospital with lacerations.

Police say they don't know what sparked the fight and have appealed for witnesses while they review CCTV footage.