The full moon rises behind St Basil's Cathedral at Red Square in Moscow on June 8, 2017.

Russia embarked on a “purge” of suspected spies after the leak of the dossier that provided unsubstantiated claims of potential ties between President Donald Trump and the Russian government, according to the founder of the opposition research firm that produced the document.

The House Intelligence Committee published a transcript on Thursday of a behind-closed-doors interview with Glenn Simpson of Fusion GPS, who shared his concerns that people had been picked off by the Russian government after the explosive claims of a Trump-Russia connection emerged.

When asked if one of his sources was killed, Simpson said, “That’s not my information. I mean, there was a series of episodes where people were arrested or died mysteriously that came shortly after the disclosure of the existence of this information. And I do believe there was a bit of an old-fashioned purge.”

Keep Up With This Story And More By Subscribing Now

Simpson said he did not believe it was “anyone that helped us” but more likely people “taking the opportunity to settle scores or were falsely accused” and “were sources of the U.S. intelligence community, not us.”

Trump has denied all the findings in the dossier, calling it “discredited and phony [and] paid for by Democrats.”

The research in the document was aided by the intelligence sources of former British spy Christopher Steele, who was hired by Fusion GPS. Republicans and the Trump administration have waged a yearlong campaign against the dossier.