Azerbaijan Blocks Lifeline to Nagorno-Karabakh, Sparking Tensions

Azerbaijan established a checkpoint on the only land route connecting Armenia and Nagorno-Karabakh.
Armenia claims Azerbaijan's actions violate a ceasefire agreement and has called on Russia to intervene.
There have been reports of border clashes and shooting incidents in the region.
Nagorno-Karabakh is internationally recognized as Azerbaijani territory but is predominantly inhabited by ethnic Armenians.
The U.S. expressed concern over Azerbaijan's actions and urged free movement between Armenia and Nagorno-Karabakh.