"NATO's eastward expansion poses one of the main threats to Russia's national security," the embassy's Facebook page said in a statement.
The reason for this threat, he called the reduction of flying time to the cities of the European part of the country.
“How would the US leadership react if Washington, New York, Los Angeles were “under the gun?”
the diplomat said.
According to Antonov, the main topic of the talks with the United States and NATO was the issue of maintaining peace and stability in Europe through the development of security guarantees proposed by Moscow.
Antonov said earlier that Russia would decide whether it would be appropriate to continue working with the US once it received responses to its proposals for security guarantees.
US Deputy Secretary of State Victoria Nuland said that Russia and the United States during the talks "listened to each other", but have not yet begun those discussions "that need to be started to reach agreements."
According to Russian Foreign Minister Sergey Lavrov, NATO is currently engaged in artificial expansion and lures the Scandinavian countries and Ukraine into its ranks.