Gunmen have killed five Egyptian soldiers near the Suez Canal on Monday, security sources said.
Security sources said the gunmen opened fire on the soldiers while they were sitting in a car at a checkpoint near Ismailia on the Suez Canal.
The country has seen an increase in violent clashes since the army ousted President Mohamed Mursi in July.
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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.