Ukrainian President Petro Poroshenko said Tuesday he did not have "very high expectations" ahead of a Berlin summit called to discuss peace efforts in his country. 

"Let's not have very high expectations on this  meeting," Poroshenko told a joint press conference with Norwegian Prime Minister Erna Solberg in Oslo. "Am I optimistic enough? Yes I'm very optimistic about the future of Ukraine but unfortunately not so optimistic about tomorrow's meeting."