David Cameron has spoken to his Libyan counterpart Ali Zeidan following his abduction and promised the UK's support to help build a "stable, free, peaceful and prosperous" Libya, the Prime Minister's spokesman said.
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As the silence came to an end the crowd began to applaud and people shouted "I am not afraid!" in defiance of the attacks.
Italian Bruno Gulotta, 35, and Belgian mother Elke Vanbockrijck have been confirmed among the dead after a van mowed through crowds.