Voldymyr Zelenskyy was reported on Wednesday evening to be bound for Davos after Donald Trump appeared to summon him to the World Economic Forum. The Ukrainian president had said a day earlier that he did not expect to attend the conference in Switzerland as Russian attacks had plunged Ukraine into an energy crisis: “Undoubtedly, I choose Ukraine in this case, rather than the economic forum, but everything can change at any moment.”

Trump’s announcement of the meeting appeared to be at short notice, since he said it would take place on Wednesday, when his Ukrainian counterpart was not even in the same country. Zelenskyy previously said: “**Meetings with America should always end with concrete results **to strengthen Ukraine or to move closer to ending the war. And if the documents are ready, we will meet.” Talks between senior Ukrainian representatives and Trump’s envoys have been continuing since Saturday, including in Davos, but late on Wednesday it was unclear whether there would be any documents to sign.

Top Ukrainian negotiator Rustem Umerov said he had met US representatives Steve Witkoff and Jared Kushner in Davos. Umerov repeated the familiar refrain that their talks focused on security guarantees and postwar recovery. Umerov said a Ukrainian delegation also met representatives of the US investment firm Blackrock about rebuilding plans.

Vladimir Putin, the Russian president, meanwhile said that he would meet on Thursday with Witkoff and Kushner, who were headed from Davos to Moscow. Interestingly, Putin, quoted by Russian news agencies, said he would discuss with the US envoys the possible use of frozen Russian assets. The EU has been wrangling with how to mobilise Belgian-held Russian assets, about €300bn ($350bn) worth, to help Ukraine defend itself and rebuild. Putin appeared to be attempting to head off the European effort, reportedly saying he wanted to use such funding to restore “[territories] damaged during military actions”. He did not say whether those would be Ukrainian, Russian or Russian-held areas.

The Nato secretary general, Mark Rutte, on Wednesday urged its military chiefs to press their national governments to get desperately needed air defence systems to Ukraine. “Please use your influence to help your political masters to do even more,” Rutte said in a video message to top brass as they met at Nato’s Brussels headquarters. “Look deep into your stockpiles to see what more you can give to Ukraine, particularly air defence interceptors. The time really is now.”

A Ukrainian drone strike set oil terminal tanks on fire at Volna in the southern Krasnodar region on Wednesday, Russian authorities said, claiming that three people were killed and eight injured. There was claim and counterclaim after a fire at residential buildings near the city of Krasnodar in Russia’s south-west. The region’s leader said it was a Ukrainian drone strike and 11 people were injured. The Ukrainian side said it was stray Russian air defence fire. The head of Ukraine’s anti-disinformation centre, Andriy Kovalenko: “A Russian air defence missile struck a residential building in the town of Afipsky [in the Adygea region].”