Two people have been arrested in connection with the murder of 22-year-old Lavaun Witter, from Peckham.
Yesterday, police arrested two men, aged 20 and 22, on suspicion of murder. They remain in custody in a south London police station.
Officers continue to appeal for anyone with information to come forward.
Lavaun was found with a fatal stab injury in Wisbeach Road, Croydon, at 8.10pm on Friday, February 5.
He was pronounced dead at the scene at 9.09pm.
Anyone with information should call 101 or, to remain anonymous, contact Crimestoppers on 0800 555 111.