Ukraine and Russia have accused each other of hundreds of violations of a brief ceasefire that coincided with Orthodox Easter celebrations.
The Ukrainian military said on Sunday morning that Russian forces had committed 2,299 violations since the ceasefire began at 16:00 p.m. local time on Saturday.
The Russian Defense Ministry, for its part, said Ukrainian forces had committed 1,971 violations, including three failed counterattacks in the Dnipropetrovsk region.
Ukrainian President Volodymyr Zelensky had earlier declared that his country's forces would respond "symmetrically" to Russian attacks during the ceasefire, calling Easter "a time of peace."
He added that he hoped the ceasefire would be extended beyond Easter to facilitate peace negotiations, which have almost ground to a halt due to the outbreak of war in the Middle East - but Russia rejected this idea, saying the attacks would resume on Monday.
The Ukrainian military has said Russian troops carried out 28 attacks and almost 2,000 drone strikes, but did not use bombs or missiles.
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Putin's unilateral ceasefire is accompanied by attacks and mutual accusations of violations
In Ukraine's northern region of Sumy, which borders Russia, local authorities said a Russian drone hit an ambulance overnight, injuring three doctors.
Russian President Vladimir Putin declared an Easter ceasefire earlier this week, after previously rejecting repeated calls from Ukraine for a temporary cessation of fighting.
Zelensky has said his forces would act similarly.
