Tags: Petro Poroshenko

German Chancellor Angela Merkel told Russian President Vladimir Putin on the phone on Saturday that a four-way summit to discuss the situation in eastern Ukraine would not take place until there was real progress on the Minsk peace plan.

The foreign ministers of France, Germany, Russia and Ukraine will meet in Berlin on Monday to discuss the situation in eastern Ukraine and the implementation of the Minsk peace plan, Germany said on Friday.

Germany cast doubt on whether a four-way summit on the Ukraine crisis in Kazakhstan's capital Astana on Jan. 15 would take place on Monday and France's president said the meeting would depend on the likelihood of "new progress" being made.