The Kerch bridge from Russia to Crimea, a hated symbol of the Kremlin’s occupation of the southern Ukrainian peninsular, has been hit by a massive explosion on the span that carries railway traffic. Images from the bridge showed a fiercely burning fire engulfing at least two railway carriages from a train on the bridge, accompanied by a vast column of black smoke. The explosion, which witnesses said could be heard kilometres away, took place around 6am on Saturday while a train was crossing the bridge, although it was not immediately clear what caused it. Some images appeared to show a...