FILE PHOTO - An aide unveils a wanted poster before U.S. Attorney General Loretta Lynch and Federal Bureau of Investigation Director James Comey hold a news conference to announce indictments on Iranian hackers for a coordinated campaign of cyber attacks in 2012 and 2013 on several U.S. banks and a New York dam, at the Justice Department in Washington March 24, 2016. REUTERS/Jonathan Ernst

Sept 12 (Reuters) – U.S. authorities are preparing to file criminal charges after the Trump campaign said in August that some of its internal communications were hacked and blamed the Iranian government, the Washington Post reported on Thursday, citing people familiar with the matter.

The Iranian government has denied that it hacked the Trump campaign.

An FBI investigation focused on an online persona called “Robert,” who shared documents they falsely claimed to have taken while working with the Trump campaign, the Post said.

(Reporting by Costas Pitas; Editing by Eric Beech)

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