The gunman who allegedly killed 10 people at a New York grocery store on Saturday reportedly planned to stage another shooting targeting Black people.

Buffalo Police Commissioner Joseph Gramaglia told CNN that they have reviewed documents indicating that Payton Gendron, 18, intended to leave Tops Friendly Markets in Buffalo and open fire at “another large superstore.” Erie County District Attorney John Flynn, who echoed Gramagila’s claims, alleged that he planned to kill more Black people.

Buffalo police officers apprehended Gendron — who was reportedly wearing body armor — six minutes after they were dispatched to the supermarket.

Saturday’s mass shooting is believed to be racially motivated, as Gendron reportedly penned a 180-page manifesto in which he details his beliefs in the “great replacement,” a racist ideology that declares that white people and their culture are being erased by an influx of immigrants and other racial minorities. According to the Buffalo News, Gendron wrote that he originally planned to kill himself but ultimately decided to commit a mass shooting 200 miles from his home.

Gendron reportedly livestreamed Saturday’s shooting on Twitch, and a racial slur was seen on the gun he used to shoot 13 people, 11 of whom were Black.

Jailed without bond, Gendron pleaded not guilty to first-degree murder charges on Saturday. He is due back in court on Thursday.

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[Feature Photo: Ruth Whitfield, Aaron Salter Jr, Katherine Massey, Pearl Young, and Margus Morrison. Bottom, L-R, Roberty Drury, Heyward Patterson, Celestine Chaney, Geraldine Talley, and Andre Mackneil/Various Handouts]