The Saudi national who opened fire in a classroom at a naval air station in Florida Friday morning, killing three before being shot dead by officers, condemned the United States as a “nation of evil” in a post online, reports say.

Mohammed Saeed Alshamrani, who was said to be a second lieutenant in a flight training program for foreign military personnel at Naval Air Station Pensacola, posted a short manifesto to Twitter where he claimed to be “against evil,” AFP reported, citing the SITE Intelligence Group.

6 SAUDI NATIONALS DETAINED FOR QUESTIONING AFTER NAS PENSACOLA SHOOTING: OFFICIAL 

“America as a whole has turned into a nation of evil,” the post reportedly continued.

According to SITE, a group that monitors jihadist media, Alshamrani allegedly wrote in this manifesto that he “hates” Americans for their supposed crimes against Muslims and “humanity.”

"I'm not against you for just being American, I don't hate you because your freedoms, I hate you because every day you supporting, funding and committing crimes not only against Muslims but also humanity," he wrote, according to the report.

An active shooter situation was reported Friday morning at Naval Air Station Pensacola.

An active shooter situation was reported Friday morning at Naval Air Station Pensacola. (Fox News)

A spokesperson for Twitter told Fox News in an email statement Saturday that the account was suspended but they declined to comment further as to when the manifesto was tweeted out.

NAVAL AIR STATION PENSACOLA SHOOTER WAS SAUDI AVIATION STUDENT, INVESTIGATORS EYE POTENTIAL TERROR LINK