Police have charged a 25-year-old man who allegedly carried out a series of brutal, random attacks on people of Asian appearance in Randwick on Thursday night.
The unprovoked attacks left several people injured, including a 70-year-old man, and police believe they were racially motivated.
It took a group of nearby workmen to restrain the man.
The attacks began just before 10pm on Thursday when Shai Jevan Lewis, 25, was walking along Avoca Street and allegedly punched an unidentified woman in the face, police said.
As he continued down the street he allegedly assaulted several other women in a group.
Walking on to Belmore Road, he then allegedly punched a 30-year-old man in the face, before punching and kicking the 70-year-old man, leaving him with facial injuries.
Police said the man then crossed the road, allegedly punching a 26-year-old woman in the face before kicking her repeatedly.
A man who tried to intervene was also punched in the face multiple times, leaving him with facial injuries.
Inspector Aaron Wunderlich described the attacks as "unprovoked and random".
"These are very, very serious allegations."
Inspector Wunderlich saying he was "extremely proud" of the actions of the people who restrained the man until police arrived.
Four victims, including a 70-year-old man, have been identified but police believe there are at least three others who have not yet come forward.
Mr Lewis was arrested and taken to Maroubra police station, where he was charged with three counts of reckless grievous bodily harm and four counts of assault occasioning actual bodily harm.
He faced Waverley Local Court on Friday where no plea was recorded and he was ordered to undergo a mental health assessment.
Police are appealing for anyone who was assaulted, or who witnessed any assaults and have not yet spoken to police, to come forward.
Martin Herbert, who lives in the area, was shocked by the alleged attacks.
"It doesn't happen very often here," the 24-year-old told AAP on Friday.
"Overall it's a very safe and peaceful area."
Leon Hu, who lives nearby, agreed stating the area was usually "very safe".