Washington and Kiev have reached an agreement on the most important points of the plan put forward by the United States to end the war in Ukraine, according to a senior Ukrainian official on Tuesday.

"Our delegations reached a common understanding on the core terms of the agreement discussed in Geneva," said Rustem Umerov, a former defence minister who is now secretary of Ukraine's National Security and Defence Council and a member of his country's negotiating team.

"We now count on the support of our European partners in our further steps," he wrote on Facebook. "We look forward to organizing a visit of Ukraine's President [Volodymyr Zelensky] to the US at the earliest suitable date in November to complete final steps and make a deal with President [Donald] Trump."

According to US media reports, high-ranking members of the US government are currently in Abu Dhabi to discuss the emerging plan with a Russian delegation.

US Army Secretary Daniel Driscoll has been holding talks with representatives of the Russian government since Monday, according to reports from broadcasters CBS, CNN and the Wall Street Journal newspaper.

Last week, the US presented a 28-point plan to end the war in Ukraine, which began with an invasion by Russian troops on February 24, 2022.

The plan initially appeared to contain most of the Kremlin's conditions for ending the war, but has since been intensively renegotiated by European and Ukrainian diplomats.

Russian President Vladimir Putin described the original version of the 28-point plan as "the basis for a final peace settlement," but has warned against any major softening of the deal in favour of Kiev.