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Ukrainian PM, in Germany, seeks continued Western unity in pressing Russia on peace deal

  • German President Joachim Gauck, right, and the Prime Minister of Ukraine, Arseniy Yatsenyuk, left, shake hands prior to a meeting at the Bellevue palace in Berlin, Germany, Wednesday, Jan. 7, 2015. (AP Photo/Michael Sohn)

    German President Joachim Gauck, right, and the Prime Minister of Ukraine, Arseniy Yatsenyuk, left, shake hands prior to a meeting at the Bellevue palace in Berlin, Germany, Wednesday, Jan. 7, 2015. (AP Photo/Michael Sohn)  (The Associated Press)

  • German Chancellor Angela Merkel, right, welcomes the Prime Minister of Ukraine Arseniy Yatsenyuk at the chancellery in Berlin, Thursday, Jan. 8, 2015. Merkel and Yatsenyuk meet for bilateral talks in Berlin. (AP Photo/Markus Schreiber)

    German Chancellor Angela Merkel, right, welcomes the Prime Minister of Ukraine Arseniy Yatsenyuk at the chancellery in Berlin, Thursday, Jan. 8, 2015. Merkel and Yatsenyuk meet for bilateral talks in Berlin. (AP Photo/Markus Schreiber)  (The Associated Press)

  • German Chancellor Angela Merkel, right, and the Prime Minister of Ukraine Arseniy Yatsenyuk, left, listen to the national anthems during the welcoming ceremony at the chancellery in Berlin, Thursday, Jan. 8, 2015. Merkel and Yatsenyuk meet for bilateral talks in Berlin. (AP Photo/Markus Schreiber)

    German Chancellor Angela Merkel, right, and the Prime Minister of Ukraine Arseniy Yatsenyuk, left, listen to the national anthems during the welcoming ceremony at the chancellery in Berlin, Thursday, Jan. 8, 2015. Merkel and Yatsenyuk meet for bilateral talks in Berlin. (AP Photo/Markus Schreiber)  (The Associated Press)

Ukraine's prime minister is calling for continued Western unity in pressing Russia to fully implement a much-violated peace deal.

Arseniy Yatsenyuk said Thursday that Russia is "desperately trying" to split European Union countries, "but they're going to fail."

Yatsenyuk is in Berlin to meet Chancellor Angela Merkel, who has been a key figure in trying to broker a diplomatic solution to the crisis in eastern Ukraine.

He said during an appearance at the German Council on Foreign Relations think-tank that the Minsk cease-fire agreement dating back to September is still viable and the most urgent priority is to seal the Russia-Ukraine border.

Yatsenyuk says that everyone including Russia must "execute all 12 points of this Minsk deal."