Police were called at 5.15pm on Wednesday, 3 October, to reports of a fight on Portland Road, South Norwood (SE25).
Upon arrival, officers found a male with a facial injury, which is believed to have possibly been caused by a knife.
Another male was arrested on suspicion of possession of a bladed article.
Enquiries are ongoing as officers continue to investigate the incident. Anyone with information is urged to contact the police at 101 or reach out anonymously to Crimestoppers at 0800 555 111.
