The US has said it is suspending talks with Russia over Syria, accusing Moscow of having “failed to live up” to its commitments under a ceasefire deal.
Washington blamed Russia and the Syrian government for intensifying their attacks against civilians.
Russia has suspended an agreement with the US on the disposal of surplus weapons-grade plutonium, the latest sign of worsening bilateral relations.
In a decree, President Vladimir Putin accused the US of creating “a threat to strategic stability, as a result of unfriendly actions” towards Russia.
Moscow also set pre-conditions for the US for the deal to be resumed.
Under the 2000 deal, each side is supposed to get rid of 34 tonnes of plutonium by burning it in reactors.
America is much, much weaker on the world stage coming out of the Obama presidency.