On June 10, 2026, a regular meeting of the CSTO Council of Foreign Ministers was held in Kazan (Russian Federation) under the chairmanship of the Russian side, with the participation of CSTO Secretary General Talatbek Masadykov. CIS Deputy Secretary General Denis Trefilov and SCO Deputy Secretary General Oleg Kopylov were also invited to attend the meeting.

On June 9, 2026, a delegation of the Secretariat of the Collective Security Treaty Organization, headed by CSTO Deputy Secretary General Valery Semerikov, took part in the 19th Meeting of Heads of Lead Counter-Terrorism Units of the Competent Authorities of the CIS Member States and Heads of National Structures Responsible for Coordinating Counter-Terrorism and Counter-Extremism Activities. The event was organized by the Anti-Terrorism Center of the CIS Member States.

A working meeting between CSTO Secretary General Talatbek Masadykov and Director of the Institute of China and Contemporary Asia of the Russian Academy of Sciences Kirill Babaev was held at the Secretariat of the Collective Security Treaty Organization.

From June 2 to 4, the Republic of Belarus hosted the second staff talks on the organization and conduct of the CSTO Peacekeeping Forces command-and-staff exercise “Indestructible Brotherhood 2026” and the special exercise “Barrier 2026” involving the CSTO Joint CBRN Protection and Medical Support Formation.