Two years ago, in October 2017, several European countries detected elevated levels of radiation in the air. An accident at the Mayak nuclear plant in southern Urals was said to have caused the nuclear cloud. Now, a team of physicists have established that Italian scientists from the Borexino neutrino detector, who performed physical experiments, were to blame for the leakage of radioactive ruthenium-106 into the atmosphere of Russia and Europe. The Russian Mayak plant, which was accused of releasing a hazardous chemical, is not to blame.
Summary
Russia calls on the USA to give up on mid- and short-range missile deployment plans. Washington is the “gravedigger of the INF Treaty” because they have started and finished the procedure of unilateral withdrawal from the Treaty.
Disproof
Recurring pro-Kremlin narrative claiming that the US is entirely responsible for the demise of the INF treaty.
Since 2014, the US has been trying to resolve the issue and has pressed Russia to return to the compliance with its obligations under the INF Treaty. However, it faced continuous attempts to mislead and denials.
Finally, in August 2019, the North Atlantic Council stated that the United States has withdrawn from the INF Treaty as a result of the continuous Russian violations. This decision is fully supported by NATO's allies.
Similar cases claiming that there is no evidence that Russia violated the INF Treaty and that Washington is fully responsible for its termination can be found here and here respectively.