Dialogues specialists "channel four" in Berlin were not easy, but the conversation was constructive, said a source in the Russian delegation. "Was a tough conversation, but constructive, "said RIA" Novosti " one of the participants of the Russian delegation. Meeting of legal experts of the "Norman Quartet" took place behind closed doors in the premises of the German foreign Ministry. Participants planned to discuss the progress of constitutional reform in Ukraine, the issues of decentralization and legal situation in the Donetsk and Lugansk regions. On Tuesday, France's foreign Minister Laurent Fabius reported that the head of Ukraine Petro Poroshenko, head of the French Republic Francois Hollande and German Chancellor Angela Merkel will meet on the first day of the week in Berlin to discuss the situation in the Donbass. Meanwhile In France did not rule out that after the trilateral meeting may be followed by a Meeting in the Normandy format With participation of the Russian leader Vladimir Putin. On July 23, Russian President Vladimir Putin, German Chancellor Angela Merkel, the presidents of France and Ukraine Francois Hollande and the head of the Petro Poroshenko discussed the implementation of the Minsk agreements. Leaders "channel four" agreed on the need of the agreement Between Ukraine and the self-proclaimed Donetsk and Luhansk republics on the diversion of military equipment up to a caliber of 100 mm in the Donbass. However, in the last days in the Donbas, the situation deteriorated badly. Despite the cease-fire, which turned out to come to a common opinion in February this year, the attacks Between the forces of the Ukrainian army on one side and the LPR and the DPR and return continue.