The sister of Sean Rigg, who died while he was being held at Brixton police station in 2008, has welcomed a review which said the IPCC should look again at whether police officers should face misconduct proceedings for the way they dealt with Rigg.
She said: "It is the family's strong opinion that possible criminal offences should also be considered afresh."
"My family's pursuit of justice and our dignified determination to arrive at a truly clear picture of what happened," she added, "has hopefully contributed to real and positive change into the way the IPCC and all key agencies should fulfil their obligations, by law, into a death in custody."
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Scotland Yard said the male youths will appear in custody at Westminster Magistrates' Court on Saturday.
Windy this weekend with gales across northwestern parts of the UK. Rain spreading southeast.
Greater Manchester Police said "inquiries are ongoing to fully understand the circumstances of the incident."