Five people have been arrested over the death of a teenager who was stabbed during a street fight.
Alex Mulumba Kamondo died from a single stab wound
Alex Mulumba Kamondo, 15, was knifed in the heart after allegedly getting into a row with a gang in Black Prince Road, Lambeth, south London, on Thursday.
He and two friends were attacked by youths armed with a number of weapons.
Two men, aged 18 and 20, were arrested on Saturday. Two 14-year-old boys and another, aged 16, were held on Friday. They are at several police stations.
Alex, who lived in the Kennington area, was originally from Zaire.
'Out of control'
Alex's grieving father Kamondo Mulumba visited the murder scene on Friday. He said: "Alex was a good boy, he had nothing at all to do with knives."
He added: "Knives are out of control. Most young people are walking around (with them)."
Detectives said it was unclear what the motive for the attack was.
A post-mortem examination on Saturday confirmed Alex had died from a single stab wound to the heart.