Oil prices rose as supply concerns resurfaced while peace talks ending the war in Ukraine are likely to take longer, leaving in place sanctions on Russian crude and raising the chance of further restrictions on its buyers.

Brent crude futures were at $65.93 a barrel by 0149 GMT, up 14 cents, or 0.21%. US West Texas Intermediate crude futures for September delivery, set to expire on Wednesday, rose 37 cents to $62.72 a barrel, up 0.59%.

'There were concessions almost immediately made on the part of the Russians in the first meeting in Alaska,' said Steve Witkoff.

Witkoff said the discussions in Anchorage focused on achieving a long-term peace deal rather than a temporary ceasefire.

US President Donald Trump said Russian President Vladimir Putin and Ukrainian President Volodymyr Zelenskyy are in the process of setting up a meeting to discuss ending the war in Ukraine.

"They are in the process of setting it up," Trump said in a radio interview on "The Mark Levin show," adding that the killing in the war has to stop.

Top US officer General Dan Caine will hold talks on Ukraine with European military leaders in Washington, a US defence official said.

The military chiefs will discuss "best options for a potential Ukraine peace deal," the official told AFP news agency on condition of anonymity.

Donald Trump said that a Ukraine peace deal could boost his chances of getting to heaven — joking that his odds of making it through the pearly gates are currently low.

"I want to try and get to heaven if possible," Trump told Fox News morning show "Fox & Friends."

"I hear I'm not doing well — I hear I'm really at the bottom of the totem pole! But if I can get to heaven, this will be one of the reasons."

The White House said that the United States can assist in the coordination of security guarantees for Ukraine and that President Donald Trump has directed his national security team to work with Europe.

"The President has definitively stated US boots will not be on the ground in Ukraine, but we can certainly help in the coordination and perhaps provide other means of security guarantees to our European allies," White House Press Secretary Karoline Leavitt said.

White House Press Secretary says US President "solved seven global conflicts in seven months" while accusing "left-wing" media of carrying out "negative and downright false coverage" of Trump and his foreign policy.

UN Secretary-General Antonio Guterres welcomed efforts spearheaded by US President Donald Trump to achieve a peaceful settlement in Ukraine.

"The Secretary-General very much welcomes the recent diplomatic engagements spearheaded by the US and President Trump, focusing on achieving a peaceful settlement in Ukraine, and obviously yesterday's discussions in Washington were the center of that effort," said UN spokesperson Stephane Dujarric at a news conference.

"For him, it's very important that all involved continue to stay actively engaged in what we want to see as an inclusive dialogue to sustain the important momentum that was created to bring an immediate ceasefire and sustainable peace in Ukraine," he added.

Leaders agreed to maintain close coordination in their efforts to achieve peace in Ukraine and security in the Black Sea region.

European Union foreign policy chief Kaja Kallas said the EU would continue targeting Russia's war economy and that the next sanctions package against Moscow should be ready by next month.

She was speaking after a virtual European Council summit of about the war in Ukraine, a day after an extraordinary summit of Ukrainian and several EU leaders with US President Donald Trump in Washington.

Kallas said "unity among EU leaders in today's virtual summit was palpable" and that she had placed the topics of Ukraine security and Russia sanctions at the top of the agenda for talks next week among EU foreign and defence ministers.

"(Russian President Vladimir) Putin cannot be trusted to honour any promise or commitment. Therefore, security guarantees must be strong and credible enough to deter Russia from re-grouping and re-attacking," she said in a post on X.