Pentagon denied on Thursday media reports that a Russian nuclear powered submarine cruised unnoticed for several weeks in the Gulf of Mexico near the shores of the United States.

“I don’t know what that information was based on, but it was not correct,” Wendy Snyder, a spokeswoman for the Pentagon, said.

The Washington Free Beacon reported earlier that Russia’s Akula class nuclear powered submarine (Project 971) freely traveled in June and July in the waters of the Gulf of Mexico undetected by the U.S. Navy.

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