KYIV, Ukraine (AP) — Russia bombarded Ukrainian cities with missiles, drones and glide bombs, killing at least nine civilians, officials said Tuesday, as Ukrainian President Volodymyr Zelenskyy warned that Moscow is receiving new military help for its more than 4-year-old invasion from North Korea.Zelenskyy said Russian forces used ballistic missiles supplied by North Korea in their overnight attack on the southeastern Ukraine city of Zaporizhzhia, where local officials said six people were killed and 19 wounded.A further three people, including a 15-year-old boy, were killed by Russian drones and artillery in the central Dnipropetrovsk region, local authorities said.Russia has received additional ballistic missiles from Pyongyang and is preparing to deploy more North Korean troops, Zelenskyy said late Monday.Russian President Vladimir Putin and North Korean leader Kim Jong Un signed a strategic partnership agreement just over two years ago. It vows mutual aid if either country faces aggression.

Kim has sent thousands of troops and huge supplies of weapons to support Putin’s invasion of Ukraine. Some experts say the engagement with Moscow is helping improve North Korea’s military capabilities, and Zelenskyy warned that the battlefield experience would help Pyongyang menace other countries in its region.Ukraine says Russia is scaling up its production of ballistic missiles, aiming to exploit Kyiv’s critical shortage of Patriot air defense interceptors that can stop them, and claims Moscow is readying an increase in recruitment for a new push on the front line that stretches 1,250 kilometers (775 miles) along eastern and southern Ukraine.