At least four people have been killed in a Russian airstrike on the city of Kharkiv in north-eastern Ukraine, including a 14-year-old girl, the regional military governor said on Friday. There are at least 28 injured, including several children, after bombs hit a 12-storey residential building, which partially collapsed. Several districts of Kharkiv were hit, officials said. The city, Ukraine’s second-largest city before the war began, is located about 30 kilometres from the Russian border and frequently comes under attack. At the outset of Moscow’s full-scale invasion in February 2022, Russia…