Fox News host Sean Hannity said his sources are telling him Attorney General William Barr has been far more active in his so-called "investigation of the investigators" than publicly known.

In the spring, Barr initiated a review of the origins of the Russia investigation and conduct of the Justice Department, FBI, and intelligence community, and he tasked U.S. Attorney John Durham to lead that effort.

Hannity touted the "big news" during his evening show Wednesday.

"As I talk to my sources, what they are telling me tonight is that the attorney general has taken all of it seriously, since he’s taken this job 15 steps further along than anybody knew," Hannity said, adding that this was the case for "FISA in particular."

[Also read: Barr and 'Five Eyes' pledge unity on 'emerging threats' — but questions on Huawei and ISIS remain]

Barr assumed office for his second stint as attorney general in February. Barr has said he is working closely with DOJ Inspector General Michael Horowitz, who is wrapping up an investigation into alleged Foreign Intelligence Surveillance Act abuses. The Justice Department could take prosecutorial action depending on the findings and recommendations from the independent watchdog.

Hannity suggested former FBI Director James Comey, who according to a report from his guest John Solomon of the Hill escaped prosecution for the leak of one of his memos, may still yet be in trouble because he signed three of the four FISA applications targeting former Trump campaign adviser Carter Page that relied on an unverified dossier by British ex-spy Christopher Steele.

"It seems to me that the attorney general is going to take this piece by piece, bit by bit, and he is going to go methodically slowly, get to the bottom of it. And then I assume the word prosecution will be heard a lot more often," Hannity said.