Nikolas Cruz, the 19-year-old who confessed to the school shooting at a Florida high school this week, reportedly expressed racist and violent views in a private social media chat group.

Cruz, a former student at the school who was expelled for behavioral issues, regularly shared racist, anti-Semitic and homophobic views with at least five other participants in the Instagram chat group, according to a CNN report on Friday.

CNN said it was added to the group while investigating Cruz’s online activity.

"I hate jews, ni**ers, immigrants,” Cruz reportedly wrote in the group, which he had named “Murica (American flag emoji) (eagle emoji) great.”

In the span of hundreds of messages, Cruz openly discussed killing people and specifically referred to killing Mexicans, Jews, gay people and black people, according to CNN.

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"Shoot them in the back of head,” he reportedly wrote in reference to gay people. He also espoused a disdain for white women, particularly if they were in interracial relationships.

Cruz, who was adopted, also wrote in the chat, "My real mom was a Jew. I am glad I never met her," CNN reported.

Law enforcement have said they have found no evidence of a connection between Cruz and any white supremacist group.

Cruz reportedly posted photos and videos on his Instagram page and in the group, in which he showed and discussed guns, body armor, and wrote, "I think I am going to kill people."

He also referenced killing small animals, and posted a photo of a disemboweled frog that he claimed to have killed, according to CNN.

One member of the group chat told CNN that Cruz “seemed nice but also had some mental issues.”

"All (I know) is that he likes guns and really hates liberals,” the member said.

The members did not identify themselves on or off the record to CNN, and it is unclear how they knew Cruz or became connected with him on Instagram.

The report about the suspected gunman's Instagram comments come hours after the FBI admitted to not acting on a tip it received about Cruz earlier this year.

The FBI also said that it was warned last year about a threatening YouTube comment with the same name as Cruz that read, “Im [sic] going to be a professional school shooter,” but that it was unable to identify who wrote the comment.

The Broward County Sheriff said Friday that his office had received “approximately 20” 911 calls related to Cruz in recent years and that his office would investigate how the calls were handled.

Cruz reportedly plans to plead guilty to 17 counts of premeditated murder in order to avoid the death penalty after allegedly opening fire at Marjory Stoneman Douglas High School on Wednesday, leaving 17 dead and more than a dozen injured.