Russia has declared it will take "all necessary measures" against the US following the latest sabre rattling by the two world powers.
Moscow accused Washington of intimidation after a US naval destroyer in the Baltic Sea sailed close to its territory.
Russian ambassador to Nato, Alexander Grushko, said his country would not take such actions lightly.
Speaking after a meeting with the US ambassador to Nato, Douglas Lute, and other Nato representatives, Mr Grushko added: “This is about attempts to exercise military pressure on Russia.
“We will take all necessary measures, precautions, to compensate for these attempts to use military force.”