The head of Ukraine Petro Poroshenko tried to convince in a telephone conversation with German Chancellor Angela Merkel to increase the number of OSCE observers in the Donbass and to strengthen the mission technically to verify violations of the ceasefire and the withdrawal of equipment, reports the website of the head of the Ukrainian country. on the first day of the week had a telephone conversation Poroshenko and Merkel. "Petro Poroshenko tried to convince to increase the monitoring mission of the OSCE and strengthen its technically to verify violations of the ceasefire and the withdrawal of equipment ", - is informed in the report.