Kharkiv, Zaporizhia and Donetsk regions require more air defense systems, Ukrainian President Volodymyr Zelenskyy said in an evening video message.

"The geography of our cooperation with partners for the sake of the air shield is very wide. Not everything can be shown publicly today, but it is absolutely certain that Ukraine is gradually becoming stronger. Our air defense capabilities are increasing," he said.

The President noted that "this is not 100% protection." "Such cities as Kharkiv, such regions as Donetsk and Zaporizhia regions require more systems, more security. All our diplomats and our entire state have this task," Zelenskyy said.