Explosions rocked Kyiv early Thursday, as Russia continued a wave of strikes on the Ukrainian capital. An air raid alert remained in place, and residents were urged to stay in shelters. Debris from missiles fell on the city, but no casualties were reported.

Ukrainian officials rejected Russia’s claim earlier that it had destroyed one of the billion-dollar Patriot air defense systems donated by the West. A U.S. defense official said the system suffered an indirect hit from Russian fire in the Kyiv region but is still mission-capable.