The Reuters report cited three current and four former U.S. officials who had acquired two documents prepared by the institute, the Reuters report said.
Russia has repeatedly denied interfering in last year’s election. The Kremlin and RISS did not initially respond to requests for comment on the documents before Wednesday, but on Thursday the think tank issued a statement saying the report was false, the report said.
RISS Director Mikhail Fradkov told Reuters: ”It seems, that in their conspiratorial consciousness the authors of this conceit did not weigh reality against their coveted fantasies, in order to once again draw attention to the theme ... of Russia's 'participation' in the pre-election campaign in the United States.”
Meanwhile, Kremlin spokesman Dmitry Peskov said people should not pay attention to reports based on anonymous sources, Reuters reported.
"I don't know anything about this, I can only say that seven anonymous sources are not worth one real one,” he said.
Former President Barack Obama used the documents obtained by the U.S. intelligence officials to conclude Russia mounted a "fake news" campaign and launched cyber attacks against Democratic Party groups and Hillary Clinton's campaign, the current and former officials said.