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Editor's note: Due to an editing error, an earlier version of this story incorrectly stated that the U.S.S. Truxtun had entered the Black Sea.

WASHINGTON -- A U.S. Navy destroyer was en route to the Black Sea on Thursday - but it had nothing to do with tension in Ukraine, Pentagon officials said.

The U.S.S. Truxtun was due to take part in a pre-planned exercise involving Romanian and Bulgarian vessels.

Pro-Russian forces effectively took control of Ukraine's Crimean Peninsula in the wake of last month's ouster of President Viktor Yanukovych.

Moscow has denied any role in the apparent occupation. After a meeting with his Russian counterpart Wednesday, Secretary of State John Kerry said the U.S. had "agreed to continue intense discussions in the coming days with Russia."

Map of Ukraine with the Crimea region highlightedLonely Planet / Lonely Planet Images