Viktor Yanukovych and Oliver Stone
Oliver Stone (R) with Ukraine's ousted president Viktor YanukovychFacebook/Oliver Stone

US director Oliver Stone has called Ukraine's Euromaidan revolution that ousted president Viktor Yanukovych a CIA "coup" and claimed that the West played a role in fostering anti-government protests in the country.

The filmmaker, who is not new to conspiracy theories around world events, posted the bizarre theory on Facebook after a four-hour interview with Yanukovych, whom he called "legitimate president of Ukraine until he suddenly wasn't on February 22 of this year".

Yanukovych fled to Russia with the help of Russian authorities after being accused of the mass murder of more than 100 protesters from December 2013.

The interview is part of a documentary that the JFK director is planning to release soon and which will be "produced by Ukrainians".

In the Facebook post, Stone maintains that "outside party agitators" were responsible for the Euromaidan killings. "Many witnesses, including Yanukovych and police officials, believe these foreign elements were introduced by pro-Western factions - with CIA fingerprints on it," he wrote.

He cited several examples of alleged CIA involvement in historical coup d'etat: Chavez coup of 2002, Iran coup of 1953 and Chile's in 1973.

In Ukraine, "neo-Nazi radicals forced Yanukovych to flee the country with repeated assassination attempts".

An extremist narrative has been repeatedly used by the Kremlin to condemn the new pro-Western government in Kiev and justify their backing of pro-Russian separatists in eastern Ukraine.

"The truth is not being aired in the West. It's a surreal perversion of history that's going on once again, as in Bush pre-Iraq 'WMD' campaign. But I believe the truth will finally come out in the West, I hope, in time to stop further insanity," wrote Stone.