Head techer of Fircroft Primary School in Tooting, Anne Wilson, speaks of the pain felt by everybody at the school, pupils and adults alike, after hearing that Imani Green had been killed.
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Tributes have been left in Caledonian Road in Islington where 15-year-old Alan Cartwright died after he was stabbed.
A boy has died after he and his friends were attacked while cycling in north London.
Three police officers have been praised for their actions in helping a four-year-old boy who had become stuck on a roof in Newham.