Russian President Vladimir Putin has been assumed to benefit from Trump's election | Aleksey Nikolskyi/AFP via Getty Images | Aleksey Nikolskyi/AFP via Getty Images Russia withdraws from US nuclear pact Putin accused US of not honoring its side of the deal.

The Russian government announced Monday it would suspend a deal with the U.S. on the disposal of weapons-grade plutonium as relations between the countries worsen.

Under the agreement, the two countries agreed to dispose of 34 tonnes of plutonium each so that it could not be used to build nuclear weapons. Russian President Vladimir Putin accused the U.S. of not holding up its end of the bargain, issuing a decree in which he called Washington "a threat to strategic stability" and announcing his country would no longer honor its commitment.

"We fulfilled our duties ... But our American partners did not," the president said.

In a bill sent to Russia's parliament, also on Monday, Putin set out the conditions under which Russia would resume cooperating. These included a reduction of American military forces from countries that joined NATO after 2000 and the lifting of all economic sanctions against Russia, imposed after its annexation of Crimea in March 2014, along with compensation for the country's losses.

Separately, the U.S. announced Monday it was suspending talks with Russia over the Syrian crisis, saying Moscow had not respected last month's ceasefire deal.