One person was killed and four people injured in a blast at a residential building in northwest Moscow, Russian state news agency TASS reported on Monday, citing emergency services
Baza, a Telegram channel with contacts in Russia's security services, published video showing major damage to what it said was the Alye Parusa residential complex, where the blast took place.
It was not immediately clear what had caused the blast.
In December, Ukraine took credit for the killing of Russian General Igor Kirillov in a bomb blast outside a Moscow apartment building.
There was no immediate comment from Ukraine.
Earlier, Russia fired dozens of missiles and drones at Ukraine killing 12 people, Kyiv said Saturday, as Moscow claimed its forces were pressing in on the key city of Toretsk.
The city in the eastern Donetsk region has been in the Kremlin's sights for months, as its capture would enable Russia to obstruct vital Ukrainian supply routes.
The Russian defence ministry said Saturday its troops "liberated" the village of Krymske in Toretsk's northeastern suburbs.
Fighting in the nearly three-year war has shown no signs of de-escalating, despite US President Donald Trump's promise to enact a ceasefire within "24 hours" of taking office on January 20.
At least 12 people died in Russian strikes on central and eastern Ukraine overnight and early Saturday, according to authorities.
Eight of those, including a child, were killed in a missile hit on a residential building in the central city of Poltava, emergency services said.
They published images showing firefighters searching through the smouldering ruins of a building.
The growing human and military toll of the war has also fuelled tensions over mobilisation in Ukraine.
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