Russia has hit Ukraine's second-largest city, Kharkiv, with a massive drone and bomber attack, killing four people and injuring nearly 60, officials say.
Two people were also killed in Russian strikes on Kherson, in southern Ukraine, local authorities said.
Kharkiv Mayor Ihor Terekhov said 48 drones, two missiles and four glide bombs had been used against his city on Friday night, while more glide bombs were reportedly dropped on Saturday.