Former White House top strategist Steve Bannon has been subpoenaed by special counsel Robert Mueller as part of his investigation into Russian meddling during the 2016 presidential election, a report on Tuesday said.

Bannon was subpoenaed last week to testify before a grand jury, the New York Times reported.

Mueller’s team has used subpoenas before to get information from President Trump’s associates, but this is the first time he used a grand jury subpoena, the newspaper said.

Bannon on Tuesday was appearing in a closed-door hearing with the House Intelligence Committee, which is also probing Russian interference in the election and whether any Trump campaign associates colluded.

In a blockbuster tell-all about the Trump White House, Bannon was quoted as calling a June 2016 meeting that Donald Trump Jr. had with other campaign associates and a Russian lawyer with ties to the Kremlin “treasonous.”

“The three senior guys in the campaign thought it was a good idea to meet with a foreign government inside Trump Tower in the conference room on the 25th floor — with no lawyers,” Bannon said in “Fire and Fury: Inside the Trump White House.”

“Even if you thought that this was not treasonous, or unpatriotic … you should have called the FBI immediately.”

Former Trump campaign chairman Paul Manafort and Trump’s son-in-law Jared Kushner, a White House adviser, also attended the meeting.

Trump blasted Bannon for his comments about his son and other family members, including daughter Ivanka, calling him “Sloppy Steve” on Twitter.

“When he was fired, he not only lost his job, he lost his mind,” Trump said in a statement after excerpts of the book came out earlier this month.

Bannon’s break with Trump also led to his stepping down from his post at Breitbart News, which he rejoined after leaving the White House in August 2017.