A Turkish warship which escorts a Ukrainian warship to pass through Bosporus strait is seen in the strait, Turkey, March 4, 2014. The Ukraine frigate, the Hetman Sahaydachny, escorted by a Turkish warship and a coast guard ship, accomplished its passage from the Bosphorus and sailed to the Black Sea on its way back to Ukraine. Earlier the same day, two Russian warships, the Saratov and the Yamal, also passed through the straight and headed to Ukraine. [Xinhua]