A 25-year-old man was taken to hospital after being attacked by another man at Golden Mile Complex in the wee hours of Wednesday.
A clip that has gone viral on social media shows a man lying on the floor outside a shuttered shop, while another man wearing a white top is seen stomping on him.
The man in white then approaches another man in black and punches him.
Bystanders can be heard exclaiming when the attacker returns and stomps on the man on the floor a few more times.
The police told The Sunday Times last night that a 22-year-old man has been arrested in relation to the case.
This came after they were alerted to a case of voluntarily causing grievous hurt at 5,001, Beach Road, at 3.07am on Wednesday.
The Singapore Civil Defence Force said it received a call for assistance that morning and dispatched an ambulance that took a man to Tan Tock Seng Hospital. The man, who was conscious, is believed to have severe facial injuries.
The Sunday Times understands that the victim is Singaporean.
A 34-year-old employee who has worked at Golden Mile Complex for five years told ST that fights happen there "very often".
"They happen once or twice a week and the police do get called down, but it's usually minor. This is one of the big ones," said the employee, who declined to be named.
"Sometimes people have arguments after drinks."
Police are investigating the case.
Correction note: This article has been edited for clarity.