Russian President Vladimir Putin will discuss a plan aimed at ending the war in eastern Ukraine today.
German Chancellor Angela Merkel, French President Francois Hollande and Ukraine's leader Petro Poroshenko will all take part in the four way telephone conference.
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The new peace deal could include a demilitarized zone and greater autonomy for the pro-Russian east.
Speaking at a conference in Munich, US Vice President Joe Biden says Europe and Ukraine must stand firm in negotiations.