Currently exist "no plans" for American leader President Trump to confer with Russian President Putin "in the immediate future", a White House official has announced.
Last Thursday the US president said he and the Russian president would conduct negotiations in Budapest in the coming fortnight to address the ongoing hostilities.
A initial discussion between America's top diplomat Secretary Rubio and his opposite number Foreign Minister Lavrov was planned for this week - but the White House clarified the two had had a "productive" conversation and that a face-to-face session was no longer "required".
The White House declined to provide any more details on the reason the negotiations had been put on hold.
The US president had discussed a Budapest summit via telephone with Putin, a day before hosting Ukrainian President Volodymyr Zelensky in the White House.
Various sources claimed his talks with Zelensky had been a "heated exchange", with sources suggesting the president had urged him to cede extensive regions of eastern Ukraine as part of a deal with Moscow.
Nevertheless, on Monday the American president embraced a peace initiative backed by Kyiv and European leaders to pause the conflict on the existing battle lines.
"Leave it as is the way it is," he remarked.
Russia has frequently resisted against halting the existing front lines.
The Russian government was only interested in "long-term, sustainable peace", Lavrov stated on Tuesday, suggesting that freezing the front line would merely represent a short-term truce.
The "root causes" of the hostilities demanded attention, the Russian diplomat said, using Russian diplomatic language for a set of maximalist demands that encompass the acknowledgment of complete Moscow control over the eastern region as well as the demilitarisation of the country – a non-starter for Ukraine and its Western allies.
Zelensky commented conversations concerning the current lines were the "start of negotiations" but that Moscow was "taking all measures" to prevent dialogue.
He further commented the only topic that could cause Russia to "become engaged" was that of the provision of long-range weapons to Ukraine.
The Russian president's unscheduled call with the US leader last Thursday preceded speculation that the United States was planning to provide long-range Tomahawk missiles to Ukraine that could theoretically target Russian territory.
The Ukrainian leader stated it was the missile discussion that had compelled Moscow to engage in discussion. The conversation concerning the weapons systems had emerged as a "valuable contribution" in international relations", he commented.
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