KIEV, Sept. 1 – The Sea Breeze 2015 multinational naval exercise involving the United States and Ukrainian naval vessels will strengthen security in Black Sea Region, especially after Russia's annexation of Crimea, Prime Minister Arseniy Yatseniuk said.

"After Crimea was annexed, the Black Sea region is no longer stable and secure," Yatseniuk said in Odessa on Tuesday.

He stressed that the Ukrainian military must now find a common language with its partners from other states and must also adhere to NATO standards.