There are "no preparations" for US President Donald Trump to confer with Russian President Putin "in the immediate future", a White House official has announced.
Recently Trump indicated he and the Kremlin leader would hold talks in Budapest soon to examine the war in Ukraine.
A initial discussion between US Secretary of State Marco Rubio and his opposite number Sergei Lavrov was planned for recently - but the administration said the two had had a "constructive" discussion and that a face-to-face session was not "needed".
The administration did not share further information on the reason the negotiations had been delayed.
Trump had discussed a Budapest summit during a call with Putin, a just prior to hosting Ukraine's Volodymyr Zelensky in the Oval Office.
Various sources indicated his talks with Zelensky had been a "contentious discussion", with sources claiming Trump had urged him to cede extensive regions of eastern Ukraine as part of a deal with Moscow.
Nevertheless, on this week Trump embraced a truce plan backed by Kyiv and European leaders to pause the hostilities on the present positions.
"Leave it as is the way it is," he said.
Russia has frequently resisted against freezing the existing front lines.
The Russian government was only interested in "long-term, sustainable peace", Russia's foreign minister said on Tuesday, implying that freezing the front line would only amount to a brief pause.
The "fundamental issues" of the hostilities required resolution, Lavrov stated, using Russian diplomatic language for a set of maximalist demands that encompass the acknowledgment of total Russian authority over the Donbas as well as the military reduction of the country – a non-starter for Kyiv and its European partners.
Zelensky stated talks regarding the battle positions were the "commencement of dialogue" but that Moscow was "doing everything" to avoid diplomacy.
He also said the only topic that could cause Russia to "take notice" was that of the provision of distance-capable munitions to the Ukrainian military.
Putin's unscheduled call with Trump recently occurred before speculation that the United States was preparing to send distance-capable weapons to Ukrainian forces that could potentially strike Russian territory.
Zelensky stated it was the missile discussion that had pressured the Kremlin to participate in talks. The conversation concerning the missiles had turned out to be a "strong investment" in diplomacy", he remarked.
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