The attack sparked a fire in the Bucha district, west of Kyiv, that swept through homes and damaged at least 50 residential buildings, said Tymur Tkachenko, head of the local regional military administration.

In a statement on the attack, Ukrainian President Volodymyr Zelenskyy said that a warehouse had been struck in the village of Myla, "followed by a detonation."

He did not give details on the site, but wrote in the same message that Ukrainian law forbade the storage of ammunition close to civilian homes and that criminal proceedings had been opened.

"Those who allowed this to happen must be held accountable for their decisions," Zelenskyy said.

The Ukrainian leader also wrote that a care home for elderly people and people with disabilities had been damaged, and that an evacuation from the area was ongoing.

Ukrainian Prime Minister Serhii Koretskyi also didn't offer information on the warehouse targeted, but referenced an attack on the Kyiv suburb of Vyshneve early in July, which hit an ammunition depot, killing 22 and triggering large detonations and fires that tore through nearby homes.

"Unfortunately, we can already see that the tragedy in Vyshneve did not become a lesson," Koretskyi said. "In the fifth year of a full-scale invasion, making the same mistakes is criminal negligence. And all those guilty, without exception, must be severely punished so that such situations do not happen again."

In a statement, Russia's Ministry of Defence said that it had hit a warehouse in Myla storing components and launch boosters for long-range drones. It also said that it had attacked the ports of Mykolaiv and Izmail, as well as a logistics centre and warehouse facilities storing parts for Ukraine's Flamingo cruise missiles in the Kyiv region.

Zelenskyy later announced that two officials from state-owned companies, including Ukraine's largest arms producer, Ukroboronprom, had illegally allowed the storage of weapons on the site in Vyshneve and would be held accountable. (AP)