Russia-Ukraine war at a glance: what we know on day 423 of the invasion

The Nato secretary general, Jens Stoltenberg, has said he is “confident” that Ukraine is prepared to retake more territory as Kyiv readies for a new offensive against invading Russian forces. Stoltenberg told journalists in Germany when asked if Ukraine has what it needs to successfully execute the offensive: “I’m confident that they will now be in a position to be able to liberate even more land.” He also invited the Ukrainian president, Volodymyr Zelenskiy, to the Nato summit in July and emphasised the need to support Ukraine’s battlefield logistics.

Jack Teixeira, the US air national guardsman accused of leaking classified defence documents to a small group of gamers, posted sensitive information months earlier than previously known and to a much larger chat group, the New York Times has reported. In February 2022, soon after the invasion of Ukraine, a user profile matching that of Teixeira began posting secret intelligence on the Russian war effort on a previously undisclosed chat group of about 600 members on the social platform Discord. The Pentagon has declined to comment on the new report.

A Moscow court has ordered the arrest in absentia of Bulgarian investigative journalist Christo Grozev, adding him to its list of “foreign agents”, state-owned news agency RIA has reported. Grozev is the lead Russia journalist for the Bellingcat news outlet, and played a key role in its investigation into the poisoning of the opposition politician Alexei Navalny.

Germany, Poland and Ukraine signed an agreement on Friday for a hub to repair Leopard tanks used in Ukraine to fight Russian forces, Germany’s defence minister, Boris Pistorius, said at a meeting of allies at the Ramstein airbase. He sounded a note of caution about any early invitation for Ukraine to join Nato. All parties agreed on how to finance such a hub, which will cost €150m-€200m a year and could begin operations at the end of May.

International backing for Ukraine holds “strong and true”, said the US defence secretary, Lloyd Austin, as he opened a meeting in Germany with allies to discuss further support for Kyiv. Austin confirmed the US is helping to train nine Ukrainian “storm” brigades for the counteroffensive and stressed the need to make Ukraine’s air defence system “robust” and “rigorous”. Austin said: “Our support for the forces of freedom in Ukraine holds strong and true. At today’s contact group meeting, we’ll focus on three key issues: air defence, ammunition and enablers.”

Ukraine’s defence minister, Oleksii Reznikov, has tweeted about the meeting of the Ukraine defence contact group in Ramstein, Germany, saying that Ukraine is “de facto already a part of the alliance’s security space” having reached “unprecedented levels of interoperability”.

A Moscow court has issued a warrant for the arrest of the head of Ukrainian military intelligence, Kyrylo Budanov, accusing the spy chief of organising “terrorist attacks” inside Russia, state-owned news agency RIA reported. RIA cited the court as saying that Budanov was accused of offences related to terrorism and arms smuggling. The move against him was announced “in absentia”, in an apparent acknowledgment that Budanov cannot be immediately detained.

The Canadian government announced C$39m (£23.26m) in new military assistance for Ukraine including 40 sniper rifles, 16 radio sets and a donation to a Nato fund to help in the war. The latest round of Canadian aid, which also includes ammunition for the rifles, was announced by Canada’s defence minister, Anita Anand, at the Ramstein airbase in Germany where Nato defence officials met to discuss further military supplies for Ukraine.

The UK has imposed sanctions on five people linked to the arrest of the Kremlin critic Vladimir Kara-Murza, who was jailed this week for 25 years. Elena Lenskaya, a judge who approved Kara-Murza’s arrest, along with Denis Kolesnikov and Andrei Zadachin, investigators involved in the arrest of Kara-Murza, will all be hit with sanctions. FSB agents Alexander Samofal and Konstantin Kudryavtsev, who followed Kara-Murza on multiple trips before he was poisoned in 2015, will be sanctioned as well.