Debris covers the ground and an emergency vehicle after an air strike at a detention centre in Tajoura in Libya. File photo/AP

US forces said on Wednesday they had killed 11 suspected militants linked to Daesh in their second air strike near the southern Libyan town of Murzuq in less than a week.

The attack, carried out on Tuesday, followed a Sept. 19 strike that the US said had killed eight suspected militants.

"This air strike was conducted to eliminate ISIS terrorists and deny them the ability to conduct attacks on the Libyan people," Major General William Gayler, director of operations for US Africa Command, said in a statement.

Some Daesh militants retreated south into Libya's desert as the group lost its stronghold in the coastal city of Sirte at the end of 2016.

The US has said it will not allow militants to use a conflict between eastern and western-based factions around the capital Tripoli to protect themselves.

Eastern-based forces led by Khalifa Haftar launched an offensive to capture Tripoli in April, upending UN-led plans to broker a political settlement in Libya.

Reuters