Although NATO Secretary-General Jens Stoltenberg said there would now be an intense diplomatic push to try to convince Russian Federation to give up what Pompeo said were "multiple battalions of the SSC-8 missiles", Washington is set to pull out of the treaty in February.
"In light of these facts, the United States today declares it has found Russian Federation in material breach of the treaty and will suspend our obligations as a remedy effective in 60 days unless Russian Federation returns to full and verifiable compliance", the secretary of state said.
A state department spokesperson said: "The United States announced a suspension of its obligations, effective 60 days after December 4, unless Russian Federation returns to full and verifiable compliance, as a remedy under customary global law for Russia's material breach".
After the Trump-Xi meeting Saturday, Chinese Foreign Minister Wang Yi said that Beijing supports a second North Korea-U.S. summit.
The NATO allies vow to "uphold, support, and further strengthen arms control, disarmament and non-proliferation., taking into account the prevailing security environment".
Only after a few hours after Trump's announcement, his longtime lawyer Michael Cohen pleaded guilty to lying to Congress about a Trump Tower project in Moscow, fuelling new allegations into Russia's role and the President.
If Russia does not comply within the 60-day deadline, the U.S. will begin the six-month process of formally withdrawing from the INF treaty.
He said: "In a nutshell, I answered his questions about this incident in the Black Sea".
Trump Sees a Meeting With North Korea's Kim as Soon as January
More than 30,000 North Koreans have fled to the South since the 1950-53 war on the peninsula ended in an armistice instead of a peace treaty.
Russian President Vladimir Putin won't be coming to Washington for a second summit with President Donald Trump anytime soon, a Putin spokesman said Monday. The arms race is just a fraction of that amount, totaling about $10 billion this year for a wide range of missile defense and nuclear weapons programs.
Stoltenberg said the 29 NATO allies will "collectively develop responses" should the treaty be abandoned, but he declined to say what they might be.
The 1987 Cold War-era treaty between both countries banned intermediate and short-range land-based missiles.
"We either bury our head in the sand or we take common sense action", he said.
The president said in a tweet that the US has spent $716 billion this year, an amount he called "Crazy!"
Some European allies suspect that Trump could give notice in coming months that the U.S.is leaving the treaty.
Germany, the Netherlands and Belgian are concerned about the deployment of US missiles in Europe - as happened in the 1980s, touching off large anti-American demonstrations - while being caught up in nuclear competition between Moscow and Washington.