VIENNA, Jan 13 — Russia will act to defend its national security if it does not receive a "constructive response” from the West to its security demands, its envoy to the Organisation for Security and Cooperation in Europe said during an OSCE meeting today.

"If we don’t hear constructive response to our proposals within reasonable timeframe & aggressive behavior towards (Russia) continues, we’ll have to take necessary measures to ensure strategic balance and eliminate unacceptable threats to our national security,” the Russian mission to the OSCE said on Twitter, quoting its Ambassador Alexander Lukashevich. — Reuters