After air raid sirens sounded, at least three explosions have been heard in the Ukrainian capital of Kyiv.
According to Mayor Vitalii Klitschko, residential structures in the central Shevchenkivskiy neighborhood have been destroyed.
"Rescuers are on the site," Klitshchko stated on the Telegram messaging service, adding that a fire broke out in a commercial building as a result of what he described as a drone attack.
He advised citizens to remain in bomb shelters. There were no early reports of casualties.
The chief of President Volodymyr Zelensky's administration, Andriy Yermak, attributed the strikes to so-called kamikaze drones.
"Russians think this will help them, but such actions are just their convulsions," Telegram user Yermak remarked.
In recent weeks, Ukraine has reported an increase in Russian strikes using Shahed-136 drones manufactured in Iran. Iran denies supplying Russia with drones, but the Kremlin has remained silent.
The bombings come a week after the nation's capital was struck by six Russian missiles during rush hour, killing 19 people.
According to Paul Adams of the BBC, who is in the city, today's blasts occurred at about 7am local time.
Last week's attacks, according to Russian President Vladimir Putin, were a reprisal for Ukraine's bombing of a critical bridge connecting Russia to annexed Crimea.
It was the first time during the battle that Kyiv's city center was directly targeted.
Putin stated earlier this week that there was no need for additional large-scale attacks against Ukraine.
The majority of selected targets had been struck, he added, adding that he had no intention of destroying the country.