Russian strikes on Ukraine have killed 18 people and wounded 130, Ukrainian President Volodymyr Zelensky said, warning that the death toll could increase as rescue efforts were ongoing.
The strikes hit the capital Kyiv and the northeastern city of Kharkiv in a deadly day for Ukraine as Russia's invasion drags on for almost two years.
"Unfortunately, 18 people died," Mr Zelensky said in his evening address, adding that another 130 people were wounded.
He said Kharkiv was particularly badly hit and warned "the number of dead may increase".
Mr Zelensky said rubble from an "ordinary high-rise building" in Kharkiv was still being dismantled and search efforts were ongoing.
"Ordinary people lived here," he said.
He said around 139 "ordinary houses" were damaged in the attack and that Russia had fired "more than 40 missiles" onto Ukraine.
He also warned of retaliation, saying: "Let them know over there, in Russia, that the Ukrainian character knows how to be sufficiently far-reaching in response."
"The Russian war will surely return home, to where this evil came from... Right there, in Russia," he added.
Three new Russian strikes tonight damaged infrastructure in Kharkiv, regional governor Oleh Synehubov said.
Mr Synehubov, writing on the Telegram messaging app, said it was the third wave of attacks on the city in a single day.
There was no immediate word on casualties, he said, but emergency services were at the scene.
Earlier, a gas pipeline in Kharkiv was damaged, state energy firm Naftogaz said.
Thousands of residents were left without power after electricity infrastructure was damaged, the energy ministry reported.
In Kyiv, where the blasts of air defence pierced the morning calm, officials said up to 22 people including three children had been wounded across at least three districts. Several apartments and non-residential buildings had also caught fire.
At one site, rescuers tended to dazed victims as workers swept away debris and broken glass.
"There was a very loud bang, and my mother was already running outside, shouting that we need to leave. We all went to the corridor," said local resident Daniel Boliukh, 21.
"Then, we went on the balcony to have a look, and saw all these buildings were on fire."
Some of the damage in Kyiv occurred next to the United Nations office, resident coordinator Denise Brown said in a statement.
Russia has carried out regular air strikes on cities and civilian infrastructure far behind the front lines since its invasion of Ukraine in February 2022.
Its troops, meanwhile, are attacking in several parts along the sprawling eastern front and are seeking to seize the initiative, Ukraine's military says.
Today's strikes also killed one person in the southeastern city of Pavlohrad, the regional governor said.
Ukraine's air force said the military had destroyed 21 out of 41 missiles of various types fired by Russia.
Nearly 20 had been shot down over Kyiv, a city spokesman said.
A Ukrainian general, Serhiy Naiev, posted a video which he said depicted air defence forces shooting down a Russian missile with a machinegun.
Kyiv has repeatedly called for higher quantities of advanced air defence systems from its Western partners as it struggles to defend itself from Russian strikes.
Russia's forces have increasingly employed a mix of air- and land-based missiles that are more difficult to shoot down.
"The world must understand that this terror can only be stopped by force," the head of Ukraine's presidential administration, Andriy Yermak, wrote on Telegram.
Officials in the northern region of Sumy also said critical infrastructure had been damaged by a missile strike on the city of Shostka.
The Russian defence ministry said it had struck enterprises producing missiles, explosives and ammunition.
