Secretary-General of the Collective Security Treaty Organization (CSTO), Nikolay Bordyuzha believes escalation in Nagorno-Karabakh was avoided thanks to interference of Russian President Vladimir Putin. A flare-up of the Nagorno-Karabakh conflict may detonate "a very big war in the Caucasus," Bordyuzha said adding that he has data that shelling continues in Nagorno-Karabakh and heaving weapons are used. Nevertheless, Nikolay Bordyuzha actually did not answer directly the question concerning the situation when the CSTO military forces may involve into the conflict in Nagorno-Karabakh. "We, the neighbours of Armenia and the members of the Organization, must provide political support to Armenia, first. We must not let the existing conflict to escalate, second. Another flare-up and intensive and direct armed conflict will blow up the entire Caucasus," Bordyuzha said in response to BBC Russian Service's questions at a meeting with the Association of Foreign Correspondents. "What is the most important now is to ensure peace in the region, otherwise there will be a very big war in the Caucasus," the CSTO Secretary General said. He admitted that under the Statute of the Organization, aggression against any of the CSTO member-county is aggression against all the CSTO member-countries. However, Bordyuzha hinted that the conflict in Nagorno-Karabakh cannot be considered as aggression against Armenia. In his words, Armenia has not appealed to the CSTO for military support. "Armenia has not used its full military capacity. The leadership of Armenia says only the first and second echelons of forces were involved in this war on the Line of Contact. Therefore, we have received no requests," Bordyuzha said. CSTO member-countries are Russia, Armenia, Belarus, Kazakhstan, Tajikistan, and Kyrgyzstan.