Federal agents served a grand jury subpoena and recovered sensitive national security documents from former President Donald Trump's Mar-a-Lago property in June before raiding the Trump property this week after learning from at least one person that classified documents may still be at the private club.

CORRECTION Trump FBI

There is an aerial view of Mar-a-Lago.

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According to the New York Times, investigators came to Mar-a-Lago in June to view documents that had been kept in a basement room.

CNN reported that Trump was present at the start of the June meeting with investigators but did not answer questions, while Trump's lawyers showed agents documents that were classified and gave them to the investigators.

The FBI raided Mar-A-Lago after a confidential source said there may be more classified documents at the private club.

The meeting and grand jury subpoena came after the National Archives sounded alarms about missing documents and made a criminal referral to the Justice Department.

The former president said that the FBI broke into Trump's safe and recovered 12 boxes of documents. Trump has accused the attack of being political persecution. The National Archives must receive White House documents when a president leaves office. The National Archives gave 15 boxes of Trump administration documents to Mar-a-Lago, but the Justice Department is looking into why they were taken there. According to CNN, federal agents started interviewing Trump staff at Mar-a-Lago and former White House aides who helped move the documents at the end of his presidency. The FBI agents came to Trump's Mar-a-Lago home on June 3 to talk about government records held in the basement, after which they sent a note requesting the documents be locked up with a stronger lock. The Times reported earlier this week that federal investigators served a separate subpoena for Mar-a-Lago footage to see who had access to the documents after the meeting.

According to CNN, investigators believe the records have national security implications, while the Times said the FBI left a two-page note of what was taken. The 15 boxes of documents recovered by the National Archives in June included letters between Trump and Kim, as well as a letter from Obama to Trump, according to reports.

The documents were taken from Mar-a-Lago in June.

The New York Times reported that the Subpoena gave up the search warrant in order to get the material.

The tour of a crowded closet was part of the FBI's quest for Trump documents.

A former chief of staff thinks that the person who tipped off the FBI was very close to Trump.