Russia said two of its missiles had hit a meeting of Ukrainian military officers on Sunday in the city of Sumy, where Ukraine said Russian strikes had killed 34 people and wounded 117.

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)

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.