The US and Turkey’s top diplomats clashed with each other in extraordinary fashion during the Atlantic Alliance’s most recent meeting.
Last week, warlord Haftar's LNA sent militants and weapons to bolster its defence of Sirte, already badly battered from warfare and chaos since the 2011 revolution.
The UN chief also expressed his shock at the recent discovery of mass graves in territory recently recaptured from Haftar's militia.
The battle for the central coastal city could determine control over a major source of Libya's income – oil fields that tribes allied with warlord Khalifa Haftar shut down earlier this year.
World powers pledged to "refrain from interference" in Libya's war, vowing to uphold a weapons embargo during a summit in Berlin.
Libya's unity government was created at UN-backed talks in 2015, but it has struggled to assert control, while a number of international initiatives since have failed to unite the country.
Subscribe to our Youtube channel for all latest in-depth, on the ground reporting from around the world.
Copyright © 2021 TRT World.