Ukraine's president seeks new crisis talks on Saturday
It said President Petro Poroshenko had made the comments by telephone to European Union foreign policy chief Catherine Ashton.
The "contact group" is meant to work out conditions for a ceasefire. It includes a former Ukrainian president, Moscow's ambassador to Kiev and a high-ranking official from the Organization for Security and Cooperation in Europe.
(Reporting by Natalia Zinets, Writing by Thomas Grove, Editing by Timothy Heritage)