A teenage boy has been charged with the murder of 17-year-old Malcolm Mide-Madariola in south London.
Malcolm, from Peckham, south-east London, suffered a fatal stab wound during an incident outside Clapham South Underground station on Friday.
The Metropolitan Police said they had charged a 17-year-old suspect with his murder and he will appear at Bromley Magistrates' Court on Wednesday.
An 18-year-old man who was also arrested on suspicion of murder on Monday has been bailed until later in November.
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Police were called to reports of a stabbing outside the tube station at around 4.35pm.
Officers and paramedics rushed to the scene, where they found Malcolm suffering from a stab wound.
The teenager was given first aid before being taken to hospital, where he died a short time later.
Jay Hughes. Image: Metropolitan Police
Police are also appealing for witnesses to the murder of 15-year-old Jay Hughes, who was stabbed in Bellingham just hours before Malcolm was murdered.
Jay was stabbed just after 5.20pm on November 1.
Detective Chief Inspector Chris Soole, of the Met's Homicide and Major Crime Command, said: "I'm hoping the release of Jay's image will help to jog the memory of those in and around the Randlesdown road area in Bellingham on the night of his murder.
"My team continues to work around the clock to apprehend those responsible for this callous attack, which cost a young boy his life.”
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Another man, 38-year-old Rocky Djelal, was fatally stabbed in Southwark Park last week.
Rocky was killed in Southwark Park on October 31, and police are appealing to the local community for information.
CCTV footage of the suspect walking through the park before and after the murder wearing a hi-vis jacket has been released.
The suspect is described as a white man aged between 20-35.
Knife crime rising
So far this year, there have been 119 murders in London.
Incidents involving a knife or sharp object in England and Wales have risen to 41,884, the highest recorded number since 2011.
In the year ending June 2018, there was 719 murders in the UK - 250 of which were due to a stabbing.
Anyone with information is urged to call the police, or contact Crimestoppers anonymously via 0800 555 111. You can also tweet police via @MetCC.