Grigoryan was shot dead by his colleague, due to unsafe gun handling, Armenian media reported.
One more Armenian soldier Hovsep Grigoryan (born in 1998) died on the contact line of troops as a result of a violation of the rules of safe gun handling, AzVision.az reports Armenian media.
An investigation is underway to find out the details of this incident.
The conflict between the two South Caucasus countries began in 1988 when Armenia made territorial claims against Azerbaijan. As a result of the ensuing war, in 1992 Armenian armed forces occupied 20 percent of Azerbaijan, including the Nagorno-Karabakh region and seven surrounding districts.
The 1994 ceasefire agreement was followed by peace negotiations. Armenia has not yet implemented four UN Security Council resolutions on withdrawal of its armed forces from the Nagorno-Karabakh and the surrounding districts.