New Delhi, April 13 -- Russia and Ukraine accused each other of violating a Kremlin-declared Easter ceasefire Sunday, as Orthodox Christians gathered to celebrate the holiday despite Moscow's 4-year-long war against its neighbor.

Russian President Vladimir Putin on Thursday declared a 32-hour ceasefire over the Easter weekend, ordering Russian forces to halt hostilities from 4 p.m. on Saturday until the end of Sunday. Ukrainian President Volodymyr Zelenskyy promised to abide by the ceasefire, but warned there would be a swift military response to any violations.

The General Staff of Ukraine's armed forces said in a statement Sunday that it had recorded 2,299 ceasefire violations by 7 a.m., including assaults, shelling and small drone la...