Buffalo Police Commissioner Joseph Gramaglia said Monday that mass shooting suspect Payton Gendron –  had he not been stopped – would have continued looking for more Black people to kill, according to ABC News. 

"We have uncovered information that if he escaped the supermarket he had plans to continue his attack," Gramaglia told the network. 

Gramaglia added that Gendron had plans to possibly go to another store or location. 

Buffalo Mass Shooting

A crowd gathers as police investigate after the shooting on Saturday, May 14. (AP Photo/Joshua Bessex)

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The development comes as President Biden and First Lady Jill Biden are preparing to travel to Buffalo, New York, on Tuesday. 

Gendron, 18, is accused of opening fire at a Tops Friendly Market grocery store there Saturday afternoon, killing 10 people and injuring three others. 

Buffalo mass shooting suspect appeared in court

Payton Gendron appears during his arraignment in Buffalo City Court on Saturday, May 14. (Mark Mulville/The Buffalo News via AP)

Eleven of the victims were Black individuals, while the remaining two victims were White, authorities have said. 

Attorney General Merrick Garland said on Saturday night that the Department of Justice is investigating the Buffalo mass shooting as a "hate crime and an act of racially-motivated violent extremism." 

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Buffalo, New York mass shooting location

Police secure an area around the supermarket following the shooting. (Derek Gee/The Buffalo News via AP)

Gendron was charged with first-degree murder and was ordered held without bail after pleading not guilty Saturday. 

He is due back in court on Thursday. 

Fox News’ Adam Sabes and Stephanie Pagones contributed to this report.