A former White House National Security Council staffer and current State Department adviser has been arrested and charged with illegally keeping more than 1,000 pages of classified documents at his Northern Virginia home.

Ashley Tellis was taken into custody after making an initial court appearance on Tuesday in Alexandria, Virginia. The FBI raided his home in Vienna, Virginia, on Oct. 11 and found the documents with "top secret” and "secret” markings, according to an affidavit filed with the U.S. District Court in the Eastern District of Virginia. The affidavit also alleges he met with Chinese officials at a restaurant carrying a manila envelope.

An FBI spokesperson didn’t immediately respond to a request for comment.