The United States said Sunday it has temporarily withdrawn some of its forces from Libya due to ``security conditions on the ground,'' as a Libyan military commander's forces advanced toward the capital, clashing with rival militias.
A small contingent of American troops has been in Libya in recent years helping local forces combat Islamic State group and al-Qaida militants, as well as protecting diplomatic facilities.
``The security realities on the ground in Libya are growing increasingly complex and unpredictable,'' said Marine Corps Gen. Thomas Waldhauser, the head of US Africa Command. ``Even with an adjustment of the force, we will continue to remain agile in support of existing US strategy.''
He did not provide details on the number of US troops that have been withdrawn or on how many remain inside the country.
The self-styled Libyan National Army, led by Field Marshal Khalifa Haftar , launched a surprise offensive against the capital last week, a move that could potentially drag the country back into civil war.
Libya has been gripped by unrest since the 2011 uprising that overthrew and killed Moammar Gadhafi, and in recent years has been ruled by rival authorities in the east and in Tripoli, each backed by various armed groups.
Fighting was underway Sunday at the international airport, some 24 kilometers (15 miles) from central Tripoli, after Haftar claimed to have seized the area. The airport was destroyed in a previous bout of militia fighting in 2014. Haftar said his forces had launched airstrikes targeting rival militias on the outskirts of Tripoli.
The rival militias, which are affiliated with a UN-backed government in Tripoli, said they had also carried out airstrikes, slowing Haftar's advance.
At least 23 people, including civilians, have been killed on both sides since Thursday.
The Interior Ministry of the Tripoli-based government said in a statement that at least nine people, including a physician, were killed. It said at least 55 fighters and a civilian were wounded. Ahmed al-Mesmari, spokesman for Haftar's forces, said Saturday that 14 troops had been killed since the offensive began.
The fighting has displaced hundreds of people, the UN migration agency said. The UN mission to Libya has called for a two-hour cease-fire on Sunday in parts of Tripoli to evacuate civilians and wounded people.
The LNA is supported by Egypt, the United Arab Emirates, France and Russia. It answers to the authorities based in eastern Libya, who are at odds with the UN-backed government.