London, June 17: The North Atlantic Treaty Organisation (Nato) lashed out at Russia's move to expand its nuclear arsenal, saying it amounted to 'nuclear sabre-rattling' and called it both 'unjustified' and 'dangerous'.
Nato Secretary General Jens Stoltenberg said Russian President Vladimir Putin's decision to bring 40 new intercontinental ballistic missiles into service this year confirmed the pattern in Russia's behaviour over a period of time, which indicated that it was investing more in defence in general and in nuclear capacity in particular, according to a BBC report.
The Nato said the move had also prompted it to prepare its troops.
US Secretary of State John Kerry also said he was worried over Russia's plans, adding that it was against the Start agreement which is aimed at destroying nuclear weapons in the former territories of the erstwhile Soviet Union.
Moscow revealed its plan to update its nuclear arsenal shortly after the US proposed an increase its military presence in the Nato states in eastern Europe.