A Russian strike on the south Ukrainian town of Vilniansk killed at least seven people, Kyiv said, in an attack that came hours after Russia said a Ukrainian drone killed five people on its border village. Both countries said two children were killed in each attack, in a deadly day in the more than two-year war. Kyiv also said four people were killed in eastern frontline villages in the Donetsk region. Ukrainian President Volodymyr Zelensky warned the death toll in Vilniansk —near the regional hub of Zaporizhzhia — may increase. “Seven people, including two children, have been killed by a Russ…