Detectives are continuing to hunt the culprits two years after a talented teenage footballer was stabbed to death in London.
Matthew Kitandwe, 18, was killed in Battersea, south-west London, at about 4.15pm on June 21 2016.
The teenager, who played football for Uganda's youth team, was found injured in the communal area of a block of flats on Wayford Street.
His mother, who had been waiting in a car outside, was the first on the scene after seeing the suspects follow him into the building.
Police are now renewing their appeal for witnesses in the hope of bringing the killers to justice.
A reward of £10,000 is still being offered by Crimestoppers for information that leads to the arrest and conviction of those responsible.
Police previously said there was no evidence the teenager had any gang links.
Eight people were arrested on suspicion of murder in June, July and August 2016. They have since been released with no further action to be taken against them.
Anyone with information can call police on 020 8721 4054 or Crimestoppers anonymously on 0800 555111.