A second man has been arrested on suspicion of murdering a 16-year-old boy found stabbed in the street.
The victim, now named by police as Ozell Pemberton, was discovered gravely injured after a disorder at around 3.30pm on Thursday, West Midlands Police said.
Despite the efforts of emergency services and paramedics, who carried out advanced life support, the boy was confirmed dead at the scene.
The force said a post-mortem examination revealed the teenager died from a stab wound to the chest.
A teenager fatally stabbed in Sutton Coldfield on Thursday (17 May) has been formally named as Ozell Pemberton. Police have arrested a second man, aged 21, on suspicion of his murder and are appealing for two more to turn themselves in: https://t.co/7TExfBrQZT pic.twitter.com/sUCqGeUwrk— West Midlands Police (@WMPolice) May 20, 2018
Police arrested a 21-year-old man from Erdington, Birmingham, on Saturday evening and he is being questioned by officers in custody.
The arrest followed a 17-year-old male who handed himself in at a police station in the West Midlands in the early hours of Friday morning.
Detective Chief Inspector Edward Foster, from the force’s Homicide team, said: “Our investigation is progressing at speed: we have seized and are examining many hours of CCTV footage and the scene of the stabbing has been forensically examined.
“Clearly the arrests are a significant step forward in our investigation but we now believe another two people were involved. I would ask them to do the right thing, and hand themselves in to police. It is only a matter of time before we come knocking at your door.
“We know several people were seen fleeing the area after the disorder and are still appealing for witnesses or anyone who was in the area at the time to get in touch.”
Mr Foster added: “If anyone has photos or mobile phone footage of the incident they may have captured vital evidence so I’d urge them to contact us.”