New South Wales state Premier Morris Iemma has condemned an attack on an ambulance at North Cronulla.
Two men reported to be of middle eastern appearance were seen being pursued and attacked as they tried to flee the crowd.
One of them was later escorted away by police, with blood streaming from his brow.
As the second man fled, he was pursued by an angry mob.
Earlier, a third man was also seen fleeing from a gang running after him.
Two ambulance officers were injured when an angry mob broke the
vehicle's windows and kicked its doors as its crew attempted to transport
six injured youths.
Police were also pelted with beer bottles, and their patrol cars stomped on, as outnumbered officers struggled to maintain control.
They responded with batons and capsicum spray.
Mr Iemma said lawlessness would not be tolerated and there would
be no compromises in upholding the law.
Mr Iemma also repeated his calls for calm in the troubled community,
which has been the scene of two violent incidents in the past week.
It includes an attack on two lifeguards last Sunday and a brawl on Wednesday in which youths allegedly turned on a media crew.
"I urge everyone in the community to back our police and respect the rule of law which is the bedrock of our Australian community," Mr Iemma said.
"We will do everything in our power to protect the right of all law abiding Australians and our life saving volunteers to use the beach in safety."
"The police have resources available to do their job and they will continue to do so for as long as necessary."
Police Minister Carl Scully commended the professionalism shown
by officers under the command of Assistant Commissioner Mark
Goodwin.