The thunderous echoes of what seemed like repeated blasts rattled throughout the capital.

Mayor Vitali Klitschko posted on Telegram that “one of the capital’s infrastructure facilities has been hit.” He urged folks to “Stay in shelters! The air alert continues.” Klitschko didn’t give additional particulars, and there was no additional data on whether or not and what targets might have been hit.

Russia has been repeatedly pounding Ukraine’s war-time capital and energy services throughout the nation in current weeks, inflicting widespread blackouts.