Russia has said there had been "progress" in talks with Ukraine in Abu Dhabi on finding an end to the four-year-war sparked by its full-scale invasion in 2022.
"There is definitely progress, things are moving forward in a good, positive direction," Russian negotiator Kirill Dmitriev told state media.
He criticised what he described as attempts from European nations to "disrupt the progress" at the start of a second day of talks in the UAE between Russian, Ukrainian and US negotiators.
"The warmongers from Europe, from Britain, are constantly trying to interfere with this process, constantly trying to meddle in it. And the more such attempts there are, the more we see that progress is definitely being made," Mr Dmitriev said.
"There is positive movement forward," he said in comments supplied by his press service.
He said active work was under way on restoring relations with the United States, including within the framework of a US-Russia working group on economy.
Meanwhile, Ukraine's Deputy Prime Minister Oleksiy Kuleba said Russia had carried out a "massive" drone attack on railway infrastructure in Ukraine's northern Sumy region.
The railway's energy infrastructure was also targeted, Mr Kuleba said on the Telegram messaging app, posting photos of damaged railway cars.
"The enemy is trying to stop train traffic," he said, describing the attack as "another act of terrorism" against Ukrainian logistics.
