SBI spokesperson Anzhelika Ivanova confirmed the report in a comment to Ukrinform on Tuesday, December 10.
"Yes, that's true," Ivanova said.
Criminal proceedings were opened under Part 1 of Article 111 (high treason) of the Criminal Code of Ukraine, Ivanova said.
The investigation was initiated on the basis of a statement filed by Andriy Portnov, a former deputy head of the Presidential Administration under President Viktor Yanukovych.
The SBI sent a draft suspicion notice against Poroshenko to the Prosecutor General's Office.
Poroshenko's press service described the draft suspicion notice as a Russian order to damage his reputation.
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