The latest fighting in Nagorno-Karabakh, a mountainous part of Azerbaijan populated and controlled by ethnic Armenians, erupted on Sept. 27 and is the worst in the South Caucasus since the 1990s.
World powers want to prevent a wider war that might draw in Turkey, which voices strong support for Azerbaijan, and Russia, which has a defence pact with Armenia. The conflict, close to pipelines that carry Azeri oil and gas to international markets,
has also strained relations between Ankara and its NATO allies.
Two previous ceasefires brokered by Russia had little impact on the ground. A third ceasefire since Oct. 10 was agreed on Sunday after separate talks in Washington between U.S. Secretary of State Mike Pompeo and the foreign ministers of Armenia