At least 16 people have been killed in strikes over the weekend across Ukraine, Russian-occupied territory and Russia, local authorities said, as the 40th anniversary of the Chernobyl nuclear disaster prompted fresh warnings about the risks posed by attacks near the plant during Russia’s more than four-year invasion of its neighbor. The death toll from Russian drone and missile strikes on the city of Dnipro rose to nine, regional head Oleksandr Hanzha said Sunday. One man was killed in a Ukrainian drone strike on the port city of Sevastopol, In Russian-occupied Crimea , Moscow-installed authorities said Sunday. Russia annexed the peninsula from Ukraine in 2014, a move that most of the world considered illegal, and has used it as a staging and supply point during the war.…