Chelsea have confirmed they have appointed Roberto Di Matteo as their permanent manager and first-team coach on a two-year contract.
"Although he has set the bar very high in the short time he has been in charge, we know that Roberto is the right man to lead Chelsea on to further success," said a statement on Chelsea's official website.
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The victims were collecting permits and escorts a day after their home town was liberated from the extremists.
Scotland Yard said the male youths will appear in custody at Westminster Magistrates' Court on Saturday.