Two men beat up two Romanian friends in Brighton as the visitors were waiting to catch a bus home after a night out.
Sussex Police said that the Romanians, aged 21 and 27, live in Eastbourne and were waiting at a bus stop by the Royal Pavilion in Old Steine.
The men who attacked them were with two women and asked the Romanians where they were from before punching them.
They chased the victims before punching them again and kicking them.
Sussex Police said that the attack, which happened between 3am and 3.30am on Friday 25 January, was being treated as a racially aggravated assault.
A police spokesman said: “Unfortunately we do not have detailed descriptions of the offenders but both were white.
“One was of slim build, approximately 6ft tall, aged about 21 and wore a grey sports jacket while the second was about 5ft 11in, of medium build and aged about 23.
“They were in the company of two females.
“There is no CCTV footage of the incident and, at this time, no independent witnesses have come forward.
“If anyone has information, or witnessed what happened, then we would ask them to call police as soon as possible.”
Anyone who can help is asked to call Sussex Police on 101 or the independent charity Crimestoppers anonymously on 0800 555111.