Germany, France, Russia and Ukraine will hold a summit in Berlin on Wednesday to "evaluate the implementation" of the Minsk peace accords for Ukraine, the French presidency said.

The summit will also "discuss the next steps in the process towards ending the crisis in eastern Ukraine," a statement said on Tuesday.

The meeting between German Chancellor Angela Merkel and the Russian, French and Ukrainian presidents, Vladimir Putin, Francois Hollande and Petro Poroshenko, was set in a flurry of telephone consultations.