An academic and author who was involved with the Trump campaign said he was interrogated by FBI agents at Logan International Airport Tuesday and issued a subpoena to testify in front of a grand jury as part of special counsel Robert Mueller’s probe into Russia’s involvement in the 2016 election.

The agents questioned Ted Malloch about topics including his involvement with the campaign, former Trump advisor Roger Stone, and WikiLeaks, Malloch said in a statement provided to the Globe by representatives of Skyhorse Publishing, the publisher of Malloch’s forthcoming book.

The Special Counsel’s Office and the FBI declined to comment, according to spokesmen for the agencies.