U.S. President Joe Biden said on Wednesday that putting American troops on the ground in Ukraine to deter a potential Russian invasion was "not on the table," as tension between Moscow and Washington eased slightly after a virtual summit this week.

Russian President Vladimir Putin said Moscow would send ideas to Washington within a week to follow up his talks with Biden on Tuesday about the Ukraine crisis.

Speaking to reporters at the White House, Biden said he hoped there would be an announcement by Friday of high-level meetings with Russia and major NATO allies to discuss Moscow's "concerns relative to NATO writ large" and the possibility of "bringing down the temperature along the eastern front."