A Ukrainian drone strike on an industrial city deep inside Russia has killed at least 13 people, according to the local mayor, as Kyiv steps up its campaign of long-range strikes on targets far from the frontline.
Kyiv said it hit the Taneco refinery in the city of Nizhnekamsk, about 750 miles (1,200km) from the Ukrainian border. Footage circulating online appeared to show smoke rising from the refinery.