Ukrainian President Volodymyr Zelensky won diplomatic backing from Europe and the NATO alliance on Sunday ahead of a Russia-US summit this week, where Kyiv fears President Vladimir Putin and President Donald Trump may try to dictate terms for ending the 3-1/2-year war.

Trump, who for weeks had been threatening new sanctions against Russia for failing to halt the war, announced instead on Friday that he would meet Putin on August 15 in Alaska.

A White House official has said Trump is open to Zelensky attending, but preparations are underway for only a bilateral meeting.

Russian strikes injured at least 12 in Ukraine’s Zaporizhzhia region, the country’s foreign affairs ministry said on Sunday.

Zelensky, responding to the strike, said, “That is why sanctions are needed, pressure is needed.”

The Kremlin leader last week ruled out meeting Zelensky, saying conditions for such an encounter were “unfortunately still far” from being met.

Trump said a potential deal would involve “some swapping of territories to the betterment of both (sides)”, compounding Ukrainian fears that it may face pressure to surrender land.

Zelensky says any decisions taken without Ukraine will be “stillborn” and unworkable.

On Saturday, the leaders of Britain, France, Germany, Italy, Poland, Finland and the European Commission said any diplomatic solution must protect the security interests of Ukraine and Europe.

“The US has the power to force Russia to negotiate seriously,” EU foreign policy chief Kaja Kallas said on Sunday.

“Any deal between the US and Russia must have Ukraine and the EU included, for it is a matter of Ukraine’s and the whole of Europe’s security.”

NATO Secretary General Mark Rutte told US network ABC News that Friday’s summit “will be about testing Putin, how serious he is on bringing this terrible war to an end”.

He added: “It will be, of course, about security guarantees, but also about the absolute need to acknowledge that Ukraine decides on its own future, that Ukraine has to be a sovereign nation, deciding on its own geopolitical future.”

Russia holds nearly a fifth of the country.

Rutte said a deal could not include legal recognition of Russian control over Ukrainian land, although it might include de facto recognition.

He compared it to the situation after World War Two when Washington accepted that the Baltic states of Latvia, Lithuania and Estonia were de facto controlled by the Soviet Union but did not legally recognise their annexation.

Zelenskiy said on Sunday: “The end of the war must be fair, and I am grateful to everyone who stands with Ukraine and our people today.”

Russian officials accused Europe of trying to thwart Trump’s efforts to end the war.

“The Euro-imbeciles are trying to prevent American efforts to help resolve the Ukrainian conflict,” former Russian president Dmitry Medvedev posted on social media on Sunday.

Russian Foreign Ministry spokeswoman Maria Zakharova said in a statement that the relationship between Ukraine and the European Union resembled “necrophilia”.

Sergei Markov, an analyst, said a swap could entail Russia handing over 1,500 sq km to Ukraine and obtaining 7,000 sq km, which he said Russia would capture anyway within about six months.

Ukraine and its European allies have been haunted for months by the fear that Trump, keen to claim credit for making peace and hoping to seal lucrative joint business deals between the US and Russia, could align with Putin to cut a deal that would be deeply disadvantageous to Kyiv.

The impending Putin-Trump summit has revived fears that Kyiv and Europe could be sidelined.

“What we will see emerge from Alaska will almost certainly be a catastrophe for Ukraine and Europe,” wrote Phillips P. O’Brien, professor of strategic studies at the University of St Andrews in Scotland.

“And Ukraine will face the most terrible dilemma. Do they accept this humiliating and destructive deal? Or do they go it alone, unsure of the backing of European states?”

US Vice President JD Vance said a negotiated settlement was unlikely to satisfy either side.

“Both the Russians and the Ukrainians, probably, at the end of the day, are going to be unhappy with it,” he said on Fox News’ Sunday Morning Futures with Maria Bartiromo.