(FREE BEACON) — A Russian nuclear-powered attack submarine cruised within 200 miles of the East Coast recently in the latest sign Russia is continuing to flex its naval and aerial power against the United States, defense officials said.

The submarine was identified by its NATO designation as a Russian Seirra-2 class submarine believed to be based with Russia’s Northern Fleet. It was the first time that class of Russian submarine had been detected near a U.S. coast, said officials who spoke on condition of anonymity because of the sensitive nature of anti-submarine warfare efforts.

One defense official said the submarine was believed to have been conducting anti-submarine warfare efforts against U.S. ballistic and cruise missile submarines based at Kings Bay, Georgia.

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