KYIV, Ukraine — A Russian drone strike on Kharkiv, Ukraine’s second-largest city, wounded 47 people, local officials said. Kharkiv Mayor Ihor Terekhov said drones hit 12 locations in the city late Friday. Residential buildings, civilian infrastructure and vehicles were damaged in the assault, according to Kharkiv regional Gov. Oleh Syniehubov.

Swift return to major hostilities and violations of truce appear to bode ill for efforts to secure long-term ceasefire.