Any state, including the United States and Iran, may bid for membership in the Collective Security Treaty Organization (CSTO), Secretary General Nikolay Bordyuzha said. "We partner with Iran on drug traffic issues. CSTO is an open organization and if Iran issues a bid, we will consider it," he said, RIA Novosti reports.

Armenia, Belarus, Kazakhstan, Kyrgyzstan, Russia, Tajikistan and Uzbekistan are members of the CSTO.