The man accused of attempting to break into the FBI's Cincinnati field office on Thursday reportedly handled classified material for the U.S. Military while posted on submarines years ago, and the suspect was previously known to the FBI.

"The FBI previously received information about Ricky Shiffer, the individual who attempted to breach the Visitor Screening Facility at the FBI Cincinnati Field Office on August 11, 2022," an FBI spokesperson told Fox News Digital in a statement. "The information did not contain a specific and credible threat. However, multiple field offices made attempts to locate and interview Shiffer which were unsuccessful."

Ricky Shiffer, 42, spent five years in the U.S. Navy between June 1998 and June 2003, mostly aboard the USS Columbia, a Los Angeles-class attack submarine.

The suspect also spent three years in the Florida Army National Guard as an infantryman between May 2008 and May 2011, including a deployment in support of Operation Iraqi Freedom. He was honorably discharged in May 2011, according to his service record from the Department of Defense.

During those combined eight years, Schiffer handled highly classified information, according to The Washington Post.

Authorities are looking into social media posts made on Shiffer's various accounts on Truth Social, a platform created by former President Donald Trump's media company; Facebook; and Twitter.

Shiffer is suspected of posting extremist views on several social media platforms in which he encouraged his followers to "kill the F.B.I. on sight."

The 42-year-old, who reportedly wore body armor while armed with an AR-15 style rifle and nail gun, was shot and killed after he ended the pursuit by pulling over and engaging in a six hours-long standoff in a rural field in Wilmington, Ohio.

Shiffer is believed to have made a post on his Truth Social account 30 minutes into the standoff, during which he admitted to the attack.

"Well I thought I had a way through bullet proof glass, and I didn't. If you don't hear from me, it is true I tried attacking the F.B.I., and it'll mean either I was taken off the internet, the F.B.I. got me, or they sent the regular cops while," a post by an account using Shiffer's name stated Thursday.

Screen shot of the video linked above.

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The 75-year-old author, who was born in India and has British and American citizenship, was stabbed repeatedly by an assailant named as Hadi Matar while giving an interview before a live audience at the Chautauqua Institution on Friday.

"Salman will likely lose one eye; the nerves in his arm were severed; and his liver was stabbed and damaged," his agent, Andrew Wylie, has said in a statement quoted by the BBC, adding that he is currently on a ventilator and unable to speak.

While a motive for the attack has yet to be disclosed by the authorities, who have said Rushdie was stabbed at least once in the neck and once in the abdomen, radical Muslims have been baying for the author's blood since the publication of his book The Satanic Verses in the 1980s, which included fictionalised interpretations of the life of the Islamic prophet regarded as blasphemous.

Indeed, the Ayatollah Khomeini, then-Supreme Leader of the Islamic Republic of Iran, issued an Islamic fatwa calling for the murder of Rushdie and his publishers in 1989 and put a bounty on his head, which has been raised several times over the years and is now worth millions of dollars.

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