Mercenaries from Syria must leave Nagorno-Karabakh, their activities near the CSTO countries pose risks to the collective security of the Collective Security Treaty Organization, CSTO Secretary General Stanislav Zas said at an online briefing, RIA Novosti reports.

“We had information about the presence and actions of militants from Syria in the Nagorno-Karabakh conflict zone,” Zas said.

“We proceed from the premise that any Syrian mercenaries, militants must leave this territory, stop their activities, because the creation of detachments, groups of militants, illegal armed formations directly near the borders of the CSTO member countries are certain risks for our collective security,” he pointed out.