The US did not inform the Libyan government about the arrest of the suspected ringleader of the 2012 on an American diplomatic compound, according to a Libyan minister.
The US Ambassador to the United Nations, Samantha Power, notified the UN Security Council of the capture on Sunday of Ahmed Abu Khatallah by US special forces.
She said an investigation had not only implicated him in the 2012 raid but also planned "further armed attacks" against US personnel.
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An officer who was stabbed in the eye as tried to stop the London Bridge attackers with his baton has spoken publicly for the first time.
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Six-month-old Leena Belkadi and her sister Malak Belkadi, aged eight, both died from inhalation of fire fumes, an inquest has heard.