A US Navy destroyer and, reportedly, a French frigate have entered the Black Sea, as NATO builds up its presence in the region while tensions remain high in Ukraine. Another two warships are expected to arrive in the area by the end of the week.

The US Navy 6th Fleet official command has confirmed on its official Twitter account that the destroyer USS Ross, (DDG 71), an Arleigh Burke-class guided-missile destroyer, is now in the Black Sea.