In a social media post, he stated that special counsel Jack Smith informed him on Sunday night that he was the subject of their investigation.
Mr Trump stated on Twitter that he was summoned to a grand jury, “which almost always means an Arrest and Indictment.”
The special counsel did not reply to media inquiries right away.
This would be Mr Trump’s third criminal indictment, following allegations made by Mr Smith’s team in June accusing the president of mishandling secret documents.
Mr. Trump was also charged in New York with falsifying company documents relating to hush money payments made to adult film star Stormy Daniels in 2016. He is scheduled to go on trial in that case in March, while a date for the case involving the classified document is still being negotiated by the president’s lawyers.
Mr Trump said in a statement on his Truth Social platform that he had received a letter “stating that I am a TARGET of the January 6th Grand Jury investigation, and giving me a very short 4 days to report to the Grand Jury, which almost always means an Arrest and Indictment.”
Mr. Smith was named special counsel by US Attorney General Merrick Garland shortly after Mr. Trump declared his candidacy for president last October. His staff was tasked with probing Mr Trump’s handling of confidential documents after leaving the administration, as well as supervising a sprawling federal probe into the 6 January Capitol attack and Mr Trump and his associates’ attempts to change the 2020 presidential election results.
Mr. Smith’s investigation into the events of 6 January has included interviews with dozens of top Trump administration officials and advisers, including former Vice President Mike Pence and Trump lawyer Rudy Giuliani, as well as state officials who have claimed that Mr. Trump pressured them to throw out the results of the 2020 election.
The special counsel’s office has not said what particular criminal offenses they are looking into, but Mr Garland has charged him with looking into attempts to “interfere with the lawful transfer of power following the 2020 presidential election or the certification of the Electoral College vote.”
