Nikol Pashinyan has arrived in Brussels for the EU enlargement summit
Read story
Yerevan turns to the CSTO, Baku speaks of clarifying the border
The Azerbaijani army has advanced several kilometres into Armenian territory near Lake Sev Lich in Syunik Province and in the Vardenis section of Gegharkunik. Yerevan called it a violation of its sovereignty.
Armenia's Security Council asked the Collective Security Treaty Organization for consultations. Pashinyan also held a phone call with Vladimir Putin.
Baku says its servicemen are operating on Azerbaijani territory as part of clarifying a border that was never demarcated in Soviet times.
France brought the issue to the UN Security Council. The United States called on Azerbaijan to pull back its troops.