London (CNN) Police have released images of four men they wish to speak to in connection with a "racially aggravated assault" where suspects targeted a Singapore man of Chinese ethnicity in central London.

Jonathan Mok said he was attacked in London, causing injury to his right eye. He posted two photos of his face on social media, explaining: "One image was taken in the mirror and hence, the laterally inverted image. The image that seems so be much swollen was taken as a selfie-- and the bruising only developed in the following day." This photo was taken the day after the assault.

Jonathan Mok wrote on Facebook that he was attacked by a group of people on Oxford Street on February 24, noting that one of his assailants referenced the coronavirus outbreak during the attack.

Police investigating a "racially aggravated assault" have released images of four men they wish to speak to in connection with the incident.

London's Metropolitan Police said the 23-year-old was punched, kicked and sustained facial injuries in the attack, which comes at a time of increasing xenophobia against people of East Asian appearance in the UK and around the world. Police told CNN on Thursday that no arrests have yet been made.

Officers were called to Oxford Street, near Tottenham Court Road Station, on February 24 to reports of a man being assaulted.

"This attack left the victim shaken and hurt. There's no room on our streets for this kind of violent behaviour and we are committed to finding the perpetrators," Detective Sergeant Emma Kirby said in a statement on Wednesday.

"I am keen to speak to anyone who has information about this assault. I would like to identify and speak to the four men pictured who may be able to help me with our enquiries," she added.

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