A 14-year-old girl and a 16-year-old boy will appear in court charged with the murder of a promising teenage footballer described as a "role model" for his community.
Junior Nkwelle, 15, was stabbed to death outside a block of flats on the Loughborough Estate in Brixton, south London, on Thursday evening.
Solomon Smith, 27, a youth support worker at Marcus Lipton Youth Centre a few yards from the block of flats, said Junior "was a very quiet guy, you wouldn't think anything like this would happen to him."
He was pronounced dead at the scene, with police saying the killing was not believed to be gang-related.
The two teenagers, who cannot be named for legal reasons, are due to appear at Camberwell Green Youth Court.
Locals were shocked by the death and left floral tributes outside Secker House in Minet Road.