U.S. says it will stay in Black Sea despite Russian warning

U.S. Navy guided-missile destroyer USS Porter sets sail in the Bosphorus, on its way to the Black Sea in Istanbul, Turkey, June 6, 2016. REUTERS/Murad Sezer

ABOARD THE USS MASON (Reuters) - The United States will maintain its presence in the Black Sea despite a Russian warning that a U.S. destroyer patrolling there undermined regional security, the U.S. Navy Secretary said.

The USS Porter entered the Black Sea this month, drawing heavy criticism from Moscow. Turkey and Romania are expected to push for a bigger NATO presence in the Black Sea at the NATO summit in Warsaw next month.