Russian foreign minister Sergey Lavrov says no progress has been made in Berlin talks on establishing a ceasefire between government and rebel forces in the east of Ukraine. Following the talks between Russia, Germany, France and Ukraine on Sunday, Lavrov said all issues related to sending a humanitarian convoy to Ukraine have been resolved. ‘One place where we cannot report positive results is in, first and foremost, establishing a ceasefire and [starting] a political process,’ Lavrov told a Berlin press conference that was carried live by Russian state television. Talks concluded with an agreement for the sides to meet again and continue trying to de-escalate the worst East-West crisis since the Cold War. Lavrov accused Kiev's new pro-European leaders of continually changing demands over what it would take to establish a truce after more than four months of fighting with pro-Russia separatists that has claimed more than 2,000 lives.