The missile strike Sunday was one of the deadliest single attacks on Ukraine this year, as diplomatic efforts led by the U.S. have yielded few results.

In this photo provided by the Ukrainian Parliament Commissioner for Human Rights Press Service, ruines of the regional human rights department building is seen following a Russia’s missile attack that killed at least 20 civilians in Sumy, Ukraine, Sunday, April 13, 2025. (Ukrainian Parliament Commissioner for Human Rights Press Service via AP)

Russia hit the Ukrainian city of Sumy with two missiles as civilian celebrated Palm Sunday, killing more than 30 people and injuring dozens of others, officials said.