US warplanes carried out air strikes on positions of the Islamic State (IS) group in the Libyan city of Sirte for the first time on Monday, the Pentagon and Libya's unity government announced.

Libya offensive: US launches airstrikes on Islamic State militants in Sirte

US warplanes carried out air strikes on positions of the Islamic State (IS) group in the Libyan city of Sirte for the first time on Monday, the Pentagon and Libya's unity government announced.