"The Armenian border guards took preventive action to thwart Azeri aggression in the south of the country, causing significant damage and losses," the spokeswoman added.
According to Stepanyan, Azerbaijan is using UAVs in that direction.
Earlier on Tuesday, Azeri troops used drones and rocket and artillery systems to shell the positions of the Armenian border guard in the country's southeast, next to the border crossing with Iran. One of the drones Azerbaijan used has crashed on Armenian soil.
Following the attack, the Armenian side retaliated.
Azerbaijan, with help from Turkey and Syrian and Libyan mercenaries deployed by Ankara, started a war against Karabakh (Artsakh) in the morning of September 27. The Armenian side has reported deaths and injuries both among the civilian population and the military. Foreign and local journalists too have been injured in Azeri shelling of towns and villages.