The United States has been urged 'not to play with fire' and take into account Moscow's warnings on risks of further escalation around the conflict in Ukraine, Russia's state-run news agency RIA Novosti cited Russian Deputy Foreign Minister Sergei Ryabkov as saying.
Russia also warned the West and Ukraine that there will be "disastrous consequences" if Kyiv moved against close Russian ally Belarus, making clear it would intervene to defend a country where it has deployed tactical nuclear weapons.
Commenting on the possibility of a meeting between Russian Foreign Minister Sergei Lavrov and US State Secretary Antony Blinken on the sidelines of the United Nations General Assembly in New York, he said there will not be any meeting as the sides have "nothing to talk about".
Foreign ministry spokeswoman Maria Zakharova said separately that giving carte blanche for Kyiv to carry out long-range strikes deep inside Russia would change the nature of the conflict in Ukraine.
"We would like to remind the hawks on both sides of the Atlantic... They are playing with fire and have lost all sense of reality," she told a briefing.
"The scale of conflict which started because of the West risks becoming completely different, which could bring dangerous consequences for the whole world."
"As soon as they stop supplying arms to the Kyiv regime and sponsoring the terrorist activities of Bankova (street), then it can be perceived as a signal for political and diplomatic settlement."
Zelensky said this week that Ukraine had completed preparation of a "Victory Plan" that he intends to discuss with President Joe Biden when he visits the United States next week.
Zakharova told reporters that Moscow was concerned by what she called increasingly "provocative" activity on the border with Belarus, saying she did not rule out that there could be attempts to escalate in the region.
Days after Ukraine's surprise August 6 incursion into Russia's Kursk region, Belarusian leader Alexander Lukashenko - a loyal ally of President Vladimir Putin - suggested, without providing evidence, that Kyiv may have ideas about attacking Belarus.
Minsk, which has accused Ukrainian drones of violating its airspace, later announced it was sending extra troops to its border with Ukraine, though Kyiv said it had seen no major changes in the border area.
"We take due note of the information received about the intensification of the activities of Ukrainian forces in the border zone," said Zakharova.
"We see these facts ourselves and are aware of constant attempts from the Ukrainian side to use drones and to send terrorists into the republic," she added.
Ukraine's foreign ministry said last month that the country "has never taken and is not going to take any unfriendly actions against the Belarusian people".
In a clear reference to Ukraine's Kursk incursion, Zakharova said Zelensky had shown he was capable of what she called "reckless steps", accusing him of coordinating his action with Washington ahead of a November US presidential election.
"Therefore, in line with this logic, we do not rule out the possibility that these destructive forces could set the situation in the region in motion and escalate."