This live blog has now closed, you can read more on this story here

Politico reports that Germany is facing pressure from France and Poland to supply Ukraine with the powerful Leopard 2 tanks.

Politico reports:

Supplying modern western tanks such as the Leopard 2 would be a big boost for Ukraine’s military, as Kyiv’s allies have so far only been willing to send older Soviet-era tanks that had still been in the stocks of eastern European countries, as well as other weapon systems such as howitzers and air defences.

A French official told Politico that Paris is turning the screws on Germany in the hope of extracting an agreement from Berlin to send Leopard tanks to Ukraine ahead of a Franco-German summit on January 22, the 60th anniversary of the Élysée partnership treaty between the two nations.

Moscow’s claim of killing 600 Ukrainian troops rejected by Kyiv; Ukrainian forces holding positions in Bakhmut under heavy attack, says Zelenskiy

• See all our Russia-Ukraine war coverage

Ukrainian forces are repelling constant attacks on Bakhmut in the eastern Donbas region and holding their positions in nearby Soledar in arduous conditions, Volodymyr Zelenskiy has said. The Ukrainian president said in his Sunday night video address: “Bakhmut is holding on despite everything. And even though most of the town has been destroyed by Russian strikes, our soldiers are repelling constant Russian attempts to advance. Soledar is holding on, even though there is even greater destruction and things are very difficult.”

Russia has claimed to have killed more than 600 Ukrainian troops in a “retaliatory strike” in the eastern town of Kramatorsk, but Ukraine’s armed forces rejected the claim. The mayor of the town, near the frontline city of Bakhmut, said there had been no deaths from strikes over the weekend, while a witness told Reuters on Sunday that buildings had been damaged but not destroyed and there were no obvious signs of casualties. The Russian claim seems suspicious for several reasons.

Zelenskiy denounced what he said was Russia’s failure to observe a 36-hour ceasefire it had declared for Orthodox Christmas by launching attacks on Ukrainian cities.

At least two people were killed during fighting in eastern Ukraine, officials said. Donetsk’s governor, Pavlo Kyrylenko, said one person was killed in strikes on Bakhmut and eight others in the region were wounded, Associated Press reported. Kyrylenko also said rocket attacks on Kramatorsk and Konstantynivka.

Russia and Belarus have expanded their joint military training exercises in Belarus, the country’s defence TV channel said on Sunday, as concern grows that Moscow is pressuring its closest ally to join the war in Ukraine. The two countries added weapons, soldiers and specialised equipment to the exercises, Reuters reported.

One person was killed from the attack on the Starobesheve power plant in Novyi Svit, Russia’s state news agency Tass said on Sunday. The thermal power plant was one of two – in part of Ukraine’s Donetsk region controlled by Russian forces – damaged in a rocket attack by the Ukrainian army, Moscow-installed officials said.

Demands for a special tribunal to investigate Russia for a “crime of aggression” against Ukraine have been backed by senior UK politicians from across the political divide in a move to show Vladimir Putin and his generals that they will be held to account.

The Russian government extended support to a legislative amendment that would classify maps that dispute the country’s official “territorial integrity” as punishable extremist materials, Reuters reported the state-owned Tass news agency as saying on Sunday.

About 50 Ukrainian soldiers who were released from Russian detention on Sunday as part of a prisoner swap posed for a photo on their release.