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The Russian military has attacked the command headquarters of the Ukrainian army’s southern grouping, using missiles and artillery, Russia’s defence ministry said. The claims are yet to be independently verified.

Ukraine’s special services claimed responsibility for a drone attack that hit a Russian oil refinery in Ryazan, south of Moscow, early on Wednesday morning. It said the attack took place about 2:00am (2300 GMT). The governors of the Kursk and Voronezh regions in southwest Russia that border Ukraine also reported drone attacks on their territories, saying there was no damage or injuries.

Russia attacked the Kharkiv region in northeastern Ukraine with guided bombs on Wednesday, killing at least two people and injured two others, the regional governor said. The two people were killed when a car was struck in the village of Zolochiv, where a private home was also struck, governor Oleh Syniehubov wrote on Telegram.

Ukrainian forces defending the strategic eastern stronghold of Chasiv Yar say they are still waiting for fresh ammunition after the US approved a major military aid package. Oleh Shyriaiev, commander of Ukraine’s 225th Separate Assault Battalion that is fighting near the town, said more artillery shells would help his unit hold their positions. “I hope we receive artillery shells soon,” he said. Chasiv Yar is emerging as a key battleground because of its position on elevated ground that could serve as a gateway to the cities of Kostiantynivka, Sloviansk and Kramatorsk.

The US Senate has unanimously approved legislation to ban imports of Russian uranium, after the House of Representatives passed the bill in December. The US president, Joe Biden, is expected now to sign the uranium imports bill into law.

We reported earlier (see post at 09.23) how Ukrainian forces defending the strategic eastern stronghold of Chasiv Yar say they are still waiting for fresh ammunition as they try to repel intensifying attacks.