It remained unclear whether the pro-Russia separatists would comply and how much pressure Russia would put on them to cease fire.
Putin said Sunday that fighting was continuing, including what he said was artillery fire from the Ukrainian side. Poroshenko has said his troops reserve the right to fire back if separatists attack them or civilians.
Poroshenko, in turn, told Biden that “Russian-backed separatists continued to attack Ukrainian forces, including with the use of artillery, following the cease-fire declaration,” Biden’s office said.
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