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The alleged Buffalo supermarket shooter shared his rambling plans for his deadly racist attack a half-hour before he gunned down 10 people on Saturday, a new report said.

Payton Gendron, 18, invited people to a private chat on the Discord app that revealed his white supremacist views and outlined how he’d scouted the Tops Friendly Markets in a crazed plan to kill as many black people as possible, CNN reported.

“What we know at this time is that a private, invite-only server was created by the suspect to serve as a personal diary chat log,” a spokesperson for Discord told CNN.

“Approximately 30 minutes prior to the attack, however, a small group of people were invited to and joined the server. Before that, our records indicate no other people saw the diary chat log in this private server.”

It isn’t clear how many people Gendron, who is white, invited to the private chat room or how many people viewed the content before it was taken down. A Discord spokesperson didn’t respond to an email from The Post on Wednesday.

Thousands of entries in the chat amounted to a months-long online diary, which was later shared more widely on 4Chan, an online message board that Gendron said fostered his racist extremism.


  Alleged Buffalo mass shooter Payton Gendron reportedly posted his plans for the racist attack online about 30 minutes before the rampage on Saturday. Mark Mulville/The Buffalo News via AP, File Alleged Buffalo mass shooter Payton Gendron reportedly posted his plans for the racist attack online about 30 minutes before the rampage on Saturday. Mark Mulville/The Buffalo News via AP, File

  Gendron allegedly shot 13 people in a Buffalo Tops supermarket. REUTERS/Brendan McDermid Gendron allegedly shot 13 people in a Buffalo Tops supermarket. REUTERS/Brendan McDermid

  Gendron used the online diary to document himself beheading a cat in his home. Gendron Diary Gendron used the online diary to document himself beheading a cat in his home. Gendron Diary

“Every time I think maybe I shouldn’t commit to an attack I spend 5 min [on] /pol/, then my motivation returns,” Gendron wrote in an entry, referring to a 4Chan political section.

He also used the diary to describe how he gruesomely stabbed, then beheaded a feral cat at his home in Conklin, NY — after which he posted a photo of his blood-spattered face.

Gendron has pleaded not guilty to one count of murder in the deadly shooting in Buffalo, a city 200 miles from his small, mostly white hometown.

The alleged shooter is accused of shooting 13 people in total during his rampage, which he livestreamed on Twitch while wearing military-style tactical gear including body armor.


  A memorial for the victims at the scene of the shooting in Buffalo. AP Photo/Matt Rourke A memorial for the victims at the scene of the shooting in Buffalo. AP Photo/Matt Rourke

Eleven of the victims were black while two were white, authorities said.

New York Attorney General Letitia James said Wednesday her office would probe Discord, Twitch, 4chan and other platforms that the shooter “used to amplify” the rampage.

“My office is launching investigations into the social media companies that the Buffalo shooter used to plan, promote, and stream his terror attack,” she wrote on Twitter.

“This terror attack revealed the depth and dangers of these platforms that spread and promote hate without consequence. We are doing everything in our power to stop this dangerous behavior now and ensure it never happens again.”

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