Russian attacks across Ukraine killed at least 10 people overnight and wounded dozens, Kyiv said on Tuesday, accusing Moscow of launching North Korean missiles in the raid.
The allegation comes after Ukrainian President Volodymyr Zelensky warned – without providing evidence – that Moscow was receiving more ballistic projectiles and troops from its ally Pyongyang.
Russia has turned to North Korea for support throughout its four-and-a-half-year invasion.
Earlier in the war, Pyongyang dispatched thousands of troops to help Russia fight back a Ukrainian counter-attack into its western Kursk region.
And intelligence from the West, Kyiv and Seoul, has long accused North Korea of supplying weapons to Russia.
Zelensky said on Tuesday that Ukraine had turned over proposals to US negotiators for a plan to end the war with Russia.
“We have conveyed our proposals to the American side,” Zelensky said in his nightly video address.