Russia and Ukraine exchanged strikes over the weekend, resulting in at least 16 deaths. The attacks coincided with the 40th anniversary of the Chernobyl disaster, raising concerns about nuclear safety. Ukrainian President Zelenskyy warned of the risks posed by Russian attacks near Chernobyl, while the International Atomic Energy Agency emphasized the need for urgent repairs to the plant. Ukraine's forces also targeted an oil refinery in Russia, further escalating tensions.