Subunits of the Armenian Armed Forces shattered ceasefire with Azerbaijan in Gizilhajili village of Kazakh region on January 9-10, the Defense Ministry reported.
The Armenians were silenced with a retail fire, the ministry said.
Armenia captured Nagorno-Karabakh and seven surrounding districts from Azerbaijan in a war that followed the Soviet breakup in 1991. More than 20,000 Azerbaijanis were killed, and nearly 1 million were displaced as a result of the war.
Large-scale hostilities ended with a Russia-brokered ceasefire in 1994, but Armenia has continued the occupation in defiance of four UN Security Council resolutions calling for an immediate and unconditional withdrawal.
Peace talks mediated by Russia, France and the US have produced no results so far.