NSW man, teen stabbed with broken bottles

A group of men questioned after a stabbing at a Sydney community centre have been released from police custody without charge.

Four men arrested and questioned after a man and a youth were stabbed during a brawl at a Sydney community centre have been released without charge.

A 17-year-old boy and a 21-year-old man were stabbed with broken bottles after an event involving 150 people in Rouse Hill late on Friday night.

Police are calling for witnesses or anyone with video footage of the incident to contact them.