Eleven police officers were killed in an armed attack on a main police station in the southwestern Libyan city of Sebha, security sources said.
Sebha Police Headquarters was attacked with rockets and machine guns, sources added.
There was no immediate claim of responsibility for the attack.
Libya has seen mounting deadly attacks on police and army officers, as well as members of the judiciary and political activists.
Libyan government desperately seeks to maintain security in the country and control armed militias since Libya's ex-leader Col Muammar Gaddafi was overthrown in a six-month bloody civil war in 2011.
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