KYIV, Ukraine — Ukrainian President Volodymyr Zelenskyy has threatened further attacks on military installations in Russia, after Ukrainian strikes hit the Russian city of Kazan and a village in the Kursk border region.

Ukrainian President Volodymyr Zelenskyy said Saturday that Russia had begun deploying North Korean soldiers to storm Ukrainian positions in the Kursk region. "The Russians include them in combined units and use them in operations in the Kursk region,