On Sunday, Moscow warned the US President Donald Trump that his plan to step away from the Cold War-era Treaty with the Russia is a dangerous step.

The Cold War treaty, Intermediate Range Nuclear Forces Treaty, INF was signed in 1987 by the then Presidents Ronald Reagan and Mikhail Gorbachev.

The treaty was signed to resolve the 1980s crisis with the deployment of SS-20 nuclear tipped ballistic missiles. It banned missiles that could travel 310-3,400 miles.

Which if violated or ended, Sergei Ryabkov, Russian deputy foreign minister said, “would be a very dangerous step” and accused US of risking international stability by opening up a bid war for “total supremacy” in terms of military power.

Furthermore, he said, Moscow has been observing the treaty “in the strictest way” possible, the three decade old treaty and throwing the ball in US’s court by accusing them of “flagrant violations.” With Trump on Saturday, tossing the blame on Russia for the violation of the treaty and his administration complaining about Moscow’s deployment of the 9m729 missiles, which according to Washington can travel more than 300miles and thus violates the INF treaty.

He said, “We’re the ones who have stayed in the agreement and we’ve honored the agreement, but the Russia has not unfortunately honored the agreement, so we’re going to terminate the agreement and we’re going to pull out.”

While also telling the reporters that, “Russia has violated agreement. They’ve been violating it for many years. I don’t know why President Obama didn’t negotiate or pull out. And we’re not goign to let them violate a nuclear agreement and go out and do weapons we’re not allowed to.”

Following which, John Bolton, Trump’s National Security Advisor, was set to land in Moscow on Sunday evening for a meeting with Sergei Lavrov, Russia’s Foreign Minister, next week. Additionally, he was also set to meet with Nikolai Patrushev, Security Council Secretary and Yuri Ushakov, Putin’s aide.

According to Dmitry Peskov, Kremlin spokesman, a “possible meeting” between Putin and Bolton was also being prepared. Meanwhile, Ryabkov, Deputy Foreign Minister, said he’s hoping that Bolton will “more substantively and clearly” explain what US plans are.

These meetings come just before what is said to be a second summit between Trump and Vladimir Putin, this year.