The exact content of the talks is not entirely clear, and it is not known who was part of the Russian delegation. A US official told Reuters that Driscoll, who has become a key figure in the US diplomatic efforts, also plans to meet with Ukrainian representatives in Abu Dhabi.

According to the Financial Times, Driscoll is scheduled to meet with Kirill Budanov, head of the Ukrainian Military Intelligence Service (GUR), but GUR has not commented on this information.

The meeting follows talks between the US and Ukrainian delegations in Geneva on Sunday. Both sides have hailed them as successful: US Secretary of State Marco Rubio described the meeting as"the most productive in the entire ten months" of work on the peace process, while the head of the Ukrainian delegation, the head of the presidential office, Andriy Yermak, said the dialogue had been"very productive".

Following the Geneva talks, US Secretary of State Marco Rubio announced that some changes would be made to the US plan, as most of the points in the US plan had been agreed upon and a significant number of controversial points had been adjusted.

These include the issue of the number of soldiers in the Ukrainian army, the issue of the Zaporizhia nuclear power plant, the format of the prisoner exchange, and the return of convicts.

However, the delegations agreed that the territories and the inclusion of Ukraine's non-joining with NATO in the constitution should be discussed and agreed upon at the level of the presidents of Ukraine and the United States, the publication notes.