Neighbours of eight year old Imani Green from Balham have spoken of their sorrow following the girl's death.
She was shot dead in the town of Duncans in Jamaica on Friday night.
One friend of the family said: "This is a close-knit community, so this is going to hurt us."
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The mother of a boy who is in a critical condition in hospital after he was stabbed in a street attack has issued an emotional appeal.
Police said seven men were arrested during West Ham's EFL Cup fourth round win over Chelsea at the former Olympic Stadium.
Damon Smith, 19, has been charged with making or possessing an explosive substance with intent to endanger life.