Azerbaijan said on Sunday it had established a checkpoint at the start of the Lachin corridor, the only land route linking Armenia to Nagorno-Karabakh, a step that was followed by claims of border shootings by both Azeri and Armenian forces.
WHAT IS NAGORNO-KARABAKH?
Nagorno-Karabakh, known as Artsakh by Armenians, is a landlocked mountainous area in the South Caucasus.
