Brussels, 25/05/2016 (Agence Europe) - During a phone conversation late on 23 May, the French, German, Russian and Ukrainian leaders - François Hollande, Angela Merkel, Vladimir Putin and Petro Proshenko - spoke of the importance of implementing all the measures needed for consolidating the ceasefire in eastern Ukraine, according to press releases published by the different leaders' press departments. Seven Ukrainian soldiers were killed and nine injured in fighting between 23 and 24 May -...