At least three explosions were heard in the Ukrainian capital Kyiv, just after air raid sirens went off.
The explosions happened at around 7 am local time, said the BBC. One of them sounded close to the city centre. Mayor Vitalii Klitschko said residential buildings in the central Shevchenkivskiy area have been damaged.
Andriy Yermak, head of President Volodymyr Zelensky’s office, said the attacks were from so-called kamikaze drones.
It comes a week after Kyiv was hit by several Russian missiles at rush hour, in a nationwide attack which left 19 dead.
Writing on the Telegram social media site, Klitschko said they were in the Shevchenkivskiy district, which was hit by several strikes last week.
He said rescuers were on site, and told residents to stay in air raid shelters.
Russian President Vladimir Putin said the strikes last week were in retaliation for the bombing of a key bridge linking Russia to occupied Crimea, which he blamed on Ukraine.
It was the first time during the war that the centre of Kyiv was directly targeted.
Putin also said most designated targets had been hit, and there was no need for more large-scale strikes on Ukraine. He said it was not his aim to destroy the country.