Overnight talks about the Ukraine conflict ended late in Paris with little sign of progress.
Foreign ministers of France, Germany, Russia, and Ukraine restated their support for the cease-fire plan agreed to in February at meetings in Minsk, Belarus.
However, continued fighting between Russia-backed rebels and Ukrainian forces may affect the deal.
The Minsk deal calls for a truce and heavy weapons withdrawal. After, rebel-held areas are to get more autonomy and hold elections under Ukrainian law.
