CSTO Secretary-General Stanislav Zas said Syrian mercenaries should leave Nagorno-Karabakh.

According to him, their activities near the CSTO countries pose risks to security.

“We proceed from the premise that any Syrian mercenaries and 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 noted.