A British man is one of two UN workers who have been shot dead in Somalia, the Foreign Office confirmed.
A spokesman said: "We are aware of the death of a British national on April 7. We stand ready to provide consular assistance to the family at this difficult time."
More top news
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."