A deal to end the fighting Eastern Ukraine has been agreed at a summit in Belarus.
The leaders of Russia, Ukraine, Germany and France announced that a ceasefire would begin on 15 February.
The deal, announced after 17 hours of talks, also involves a withdrawal of heavy weapons from the front line. The leaders said Ukraine's pro-Russian rebels had signed it.
Thousands of people have been killed in the fighting in eastern Ukraine.
French President Francois Hollande said he and German Chancellor Angela Merkel would ask their European Union partners to support the agreement at a summit later in the day.
The deal includes:
–Ceasefire to begin on 15 Feb
–Heavy weapons to be pulled out
–All prisoners to be released
–Mr Poroshenko said Ukraine would establish control of international border by the end of the year