Putin hits back.
More explosions have been heard just now in Kyiv.
Reports of explosions have been coming in from all across the country.
https://www.bbc.com/news/live/world-63193124Media restrictions mean that we are not yet able to reveal the sites of the first impacts in Kyiv, but video of one of them, about a mile from our hotel, shows burning cars and debris, but no obviously substantial damage to surrounding buildings.
This appears to be the most widespread set of Russian attacks since the early weeks of the war.
Kyiv blasts follow overnight strikes in south
This morning's rare blasts in the capital Kyiv follow further strikes overnight in the southern city of Zaporizhzhia and in the Dnipropetrovsk region.
"A multi-storey residential building was destroyed again. There are victims," posted Zaporizhzhia regional governor Oleksandr Starukh on the Telegram messaging app at around 03:00 local time (01:00 BST).
Emergency services attended the scene, he added. Zaporizhzhia has been hit repeatedly in recent weeks, with dozens of people killed.
Meanwhile, it was a "night of massive attacks" in Dnipropetrovsk, according to an update from the region's own governor Valentyn Reznichenko, who accuses Russia of shelling multiple regions.
Moscow has not yet commented on the blasts reported across Ukraine this morning.