The Ukrainian embassy to the UK shared a photograph of the two leaders in talks on Saturday afternoon

• Boris Johnson pledges to send more arms during surprise visit to Kyiv
• Luhansk residents told to evacuate as Russia moves focus east
• Why the battle for Donbas will be very different from the assault on Kyiv
• Survivors recount ‘nightmare’ Kramatorsk train station attack
• The train station where Russians are greeted with images of war
• Russia-Ukraine war at a glance: what we know on day 46 of the invasion
  

Here are some images from across Ukraine over the past 24 hours.

Governor issues warning as US says Moscow likely planning to deploy tens of thousands of soldiers in east

• Russia-Ukraine war: latest updates

Residents remaining in eastern Ukraine’s embattled city of Luhansk must evacuate, the governor has said as shelling intensifies and Russia bolsters its forces.

Ukraine has been warning that Moscow is withdrawing from areas to the north of Kyiv in order to focus its offensive military operations on the country’s east. Moscow, which initially justified its invasion by claiming to need to protect Russian-speaking civilians in the self-proclaimed republics in Donbas, has confirmed the change in strategy.

Volodymyr Zelenskiy calls for ‘firm global response’ to Kramatorsk station attack; 10 humanitarian corridors agreed for Saturday

• Russia-Ukraine war: latest updates

The Ukrainian president, Volodymyr Zelenskiy, has described a missile strike on a railway station in eastern Ukraine as a Russian war crime and called for a “firm global response”. At least 52 people, including five children, were killed in the missile strike on Kramatorsk train station. The US believes Russia used a short range ballistic missile on the train station. Russia has denied responsibility.

Ten humanitarian corridors have been agreed for Saturday for people from besieged regions, including the city of Mariupol, according to Ukraine’s deputy prime minister Iryna Vereshchuk. The governor of Luhansk earlier called for more evacuations, warning that shelling had increased over recent days and that more Russian troops had arrived in the region.

Russian air activity is expected to increase in the south and east of Ukraine, according to the UK’s Ministry of Defence, which said Russian operations continue to focus on the Russian-controlled territories in Donbas, as well as Mariupol and Mykolaiv, supported by continued cruise missile launches into Ukraine by Russian naval forces.

A curfew will be in place in Ukraine’s southern city of Odesa from Saturday evening until Monday evening, in response to the shelling of the train station in Kramatorsk, and the threat of a missile strike.

Two UN agencies have called for urgent action to help an estimated 1,000 seafarers stranded in Ukrainian ports and waters with dwindling supplies.

The US-based Institute for the Study of War says Ukrainian forces retain control of defensive positions in eastern and south-western Mariupol. Russian forces are continuing to attempt to redeploy units in eastern Ukraine. However, such troops are “unlikely to enable a Russian breakthrough and face poor morale”, ISW says.

Some Russian military units have experienced major losses, a senior US defence official said, and the Pentagon estimates Russia’s combat power is between 80% and 85% of pre-invasion levels.