Ukraine's government and pro-Russia rebels have agreed a memorandum on a peace plan for the eastern conflict.
The deal includes setting up a 30km (19-mile) buffer zone, a ban on overflights of part of eastern Ukraine by military aircraft and the withdrawal of foreign mercenaries on both sides.
The agreement was announced at talks in the Belarusian capital Minsk, where a ceasefire was agreed two weeks ago.
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