Kyiv | Multiple drone strikes hit a building in the centre of Ukraine’s southern port city of Odessa on Sunday, the second day in a row that unmanned aerial vehicles have struck there, the Ukrainian military said.

The flurry of drone attacks comes as Ukrainian officials warn of a new menace in the skies: “kamikaze” drones supplied to Russia by Iran, so named because they explode on impact, carrying a warhead of about 36 kilograms.