The Russian president Vladimir Putin vowed more “destruction” in Ukraine today after a drone attack yesterday, Saturday, which Moscow blamed on Kiev, on buildings in Kazan, a city in central Russia.

“Anyone who tries to destroy something in our country, whatever the scope, will have to face even more significant destruction in his country and will regret what he tried to do to our country,” he said during an official ceremony commenting on the yesterday’s strike in Kazan, about 1,000 kilometers from the border with Ukraine.

The strike targeted residential buildings without causing casualties, according to local authorities.

Dramatic images released on Russian social media show drones hitting high-rise glass buildings in a ball of fire.

Ukraine has not commented on the attack, nor on the Russian accusations.

Kiev regularly launches strikes inside Russiaoften against oil or industrial targets, in response to Russian airstrikes and the Kremlin’s attack on Ukrainian soil nearly three years ago.

It is rarer to blame the Ukraine for attacks on residential buildings so far from its borders.

In recent weeks, Vladimir Putin has threatened several times to hit the center of Kiev with his new and powerful “Orechnik” missile, which was first used in November.

Near-constant airstrikes by the Russian military have brought Ukraine’s energy system to its knees, with the country facing regular blackouts in the winter.

On the front, the Russian army is advancing rapidly, mainly in the eastern region of Donetsk, the hot spot of the fighting.

Russian troops captured the villages of Lozova, in the Kharkiv region, and Sonchivka, near the industrial city of Kurakhove in the Donetsk region, as the Russian Ministry of Defense announced today.

Sonchivka is close to Kurakhove, which is almost surrounded by the Russian army and is one of the critical areas of the fighting.

Russia has accelerated its advance into eastern Ukraine over the past two months, seeking to gain as much ground as possible before US President-elect Donald Trump takes office in January.

The Republican leader has promised to end the war quickly without ever explaining how he plans to do so.

The uncertainty surrounding this plan is causing concern in Ukraine, which, given its difficulties on the military front, fears it will be forced to accept an unfavorable deal.

Russian troops say they have captured more than 190 Ukrainian settlements this year. Against them, Kiev tries to resist despite the lack of men and ammunition.