KIEV, Dec. 27 – Secretary of Ukraine's National Security and Defense Council Oleksandr Turchynov said that any response to the decision by volunteers to launch a blockade against territories not under Ukraine's control in Donetsk and Luhansk regions is within the competence of only one official –President Petro Poroshenko, who is the nation's commander-in-chief.

"If a decision will be taken to launch a blockade, so be it. If the commander-in-chief does not take this decision, so be it. Individuals who are attempting to improvise posts in the Anti-Terrorist Operation (ATO) zone will not succeed," Turchynov told journalists on Tuesday, commenting on an initiative to block shipments to the occupied territories.