The Ukrainian capital has been struck by "kamikaze drones", the head of president Zelenskyy's office has said.

In a post on Telegram, Andriy Yermak said "explosions" hit Kyiv.

Kyiv's mayor Vitali Klitschko said there was an explosion in the Shevchenkivskyi district, which includes the historic old town and government offices.

The mayor tweeted that an air alert warning people to keep in shelters continues.

The Shevchenkivskyi district was hit by several explosions a week ago on 10 October.

Mr Yermak said Ukraine needs more air defence systems as soon as possible.

"We have no time for slow actions. More weapons to defend the sky and destroy the enemy. So be it," he added.

Ukraine has reported a spate of Russian attacks with Iranian-made Shahid-136 drones recently. Iran denies supplying the drones to Russia, while the Kremlin has not commented.

A local official said a big fire broke out at an energy facility in Ukraine's Dnipropetrovsk region after an overnight missile hit.

"Our air defence forces destroyed three enemy missiles," Valentyn Reznichenko, governor of the region, said on the Telegram messaging app.

"One missile hit an energy infrastructure facility. There is a big fire. All services are working on the site."