Russian shelling of residential areas in Ukraine’s southern city of Kherson left at least three people dead, local authorities said Sunday. In the Zaporizhzhia region, also in Ukraine’s south, Russia-installed officials said four people were killed in a railway bridge strike that they blamed on Ukraine. The front in southern Ukraine has been considerably quieter recently than in the east, with Moscow withdrawing from Kherson city in November last year. But the key city and regional capital of the eponymous Kherson region is still subject to frequent Russian shelling. “Enemy artillery pounded t…