Witnesses said they heard loud explosions across the city, and pictures showed the night sky lit in orange and heavy smoke rising from buildings. Elsewhere in the country, the Dnipro region and Chernihiv region were also targeted, Zelensky said. He said two of the seven missiles fired in the overnight strikes were "ballistics of North Korean production."

Zelensky said "for yet another night, instead of a ceasefire, there were massive strikes". Ukraine also launched drone attacks on Russia overnight, causing several airports to close temporarily. The latest strikes come after massive Russian attacks across Ukraine in the past few days.

Moscow said those strikes were in response to Ukraine's recent attacks inside Russia. A covert Ukrainian drone strike named "Operation Spider's Web" struck air bases deep inside Russia on 1 June. Russian leader Vladimir Putin had promised to respond "very strongly" to the attacks in a call with US President Donald Trump, according to the American leader.

During the attack early on Tuesday, air raid alerts were in place across large parts of Ukraine, the country's official air raid map showed, including in Kyiv and the Donetsk, Luhansk and Kharkiv regions in the east.