Kiev, Russia is to alter its military doctrine as a result of the Ukraine crisis and Nato’s presence in eastern Europe, a top Russian official says.
Mikhail Popov, a Kremlin adviser, said that deteriorating relations with the US and Nato would be reflected in the updated military strategy.
Nato said on Monday it would boost its presence in eastern Europe to protect its members.
Ukrainian troops are battling pro-Russian rebels in east Ukraine.
Ukraine’s defence minister on Monday accused Russia of launching a “great war” that could claim tens of thousands of lives – claims dismissed by Russia, which denies actively supporting the rebels.
Mr Popov, deputy secretary of Russia’s National Security Council, told Russia’s RIA news agency that Nato was “aggravating tensions with Russia”.
He said “the military infrastructure of Nato member states” was “getting closer to [Russian] borders, including via enlargement”, describing it as one of the key “external threats” to Russia.
There were no details on how the doctrine might change.
Nato announced its plans on Monday for a rapid response force of several thousand troops to protect eastern European members against possible Russian aggression.
The new measures are set to be approved at a Nato summit in Wales this week.
The Nato security alliance covers 28 member states, including eastern European countries such as Poland and the Czech Republic. It does not include Ukraine.