At least seven people have been killed including two children during intense Russian drone and missile strikes on Ukraine, officials say.
A kindergarten was hit in Ukraine's second biggest city Kharkiv and there was widespread damage in Kyiv. Children were among the 27 people wounded.
Hours earlier, US President Donald Trump said his plans for an imminent summit in Budapest with Russia's Vladimir Putin had been shelved as he did not want a wasted meeting.
President Volodymyr Zelensky said the attacks proved Moscow had not come under enough pressure for its continued war.
The Kremlin has rejected calls for a ceasefire along the current front lines made both by Trump and European leaders.
However, Russian officials said on Wednesday that preparation for a Trump-Putin summit was continuing, disputing the US president's assessment that it had been put on hold.
Kremlin spokesman Dmitry Peskov said a date had yet to be agreed upon and careful preparation was needed. He said a summit was the mutual desire of both presidents and most of the gossip and rumours surrounding it were untrue.
Ukrainian officials have reported multiple casualties due to strikes in various regions, including those who were in a house fire caused by a drone strike in the village of Pohreby.
The assault comes after Ukraine successfully targeted a Russian chemical plant with UK-made missiles, intensifying the ongoing conflict.
As the situation evolves, the international community's response continues to be closely monitored.
