A murder investigation has been launched after a fire killed an elderly woman in her flat on Deptford High Street yesterday.
82-year-old Giuseppina Fazzani died at the scene.
A 55-year-old woman was rescued from the upper floor by the London Fire Brigade and treated for smoke inhalation. She has since been discharged from hospital.
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Scotland Yard said the male youths will appear in custody at Westminster Magistrates' Court on Saturday.
The family of Oliver Dearlove urged people to "think again" before using their fists, as the man who killed him began a six-year jail term.
London Fire Brigade took Southwark Council to court on four charges in relation to safety breaches at Lakanal House in Camberwell.