Russia: Hypersonic missile strike on Ukraine a warning to 'reckless' West
President Vladimir Putin remained open to dialogue, Peskov said, but he said the outgoing administration of US President Joe Biden "prefers to continue down the path of escalation".
The Kremlin has said on Friday that a strike on Ukraine using a newly developed hypersonic ballistic missile was designed as a message to the West that Moscow will respond to their "reckless" decisions and actions in support of Ukraine.
Kremlin spokesman Dmitry Peskov was speaking a day after President Vladimir Putin said Moscow had fired the new missile - the Oreshnik or Hazel Tree - at a Ukrainian military facility.
"The main message is that the reckless decisions and actions of Western countries that produce missiles, supply them to Ukraine and subsequently participate in strikes on Russian territory cannot remain without a reaction from the Russian side," Peskov told reporters.
"The Russian side has clearly demonstrated its capabilities, and the contours of further retaliatory actions in the event that our concerns are not taken into account have been quite clearly outlined."
Peskov said Russia had not been obliged to warn the United States about the strike, but had informed the US 30 minutes before the launch anyway.
Putin said on Thursday that Russia had fired the new missile after Ukraine, with approval from the Biden administration, struck Russia with six US-made ATACMS missiles on Tuesday and with British Storm Shadow cruise missiles and US-made HIMARS on Thursday.
He said this meant that the Ukraine war had now "acquired elements of a global character".
Ukrainian President Volodymyr Zelenskyy has said Russia's use of the new missile amounted to "a clear and severe escalation" in the war and called for strong worldwide condemnation.