Kaluga

Meanwhile, the Ukrainian military said that overnight they struck the Kaluganefteprodukt oil depot in Kaluga region southeast of Moscow with drones.

Most have taken aim at energy installations, including one Friday on a refinery near Kaluga, southwest of Moscow.

A Ukrainian drone hit a refinery near the city of Kaluga, southwest of Moscow, setting four oil storage tanks ablaze, according to Vladislav Shapsha, the regional governor.

Over the weekend, a migrant-owned business was burnt down in the city of Blagoveshchensk in Russia's Far East, while several migrants were beaten up in Kaluga, a city south west of Moscow.

According to the Defense Ministry, another two drones were shot over the Kaluga region just south of the Russian capital and the Yaroslavl region northeast of Moscow.