BUFFALO, N.Y. – A civil rights advocate, a deacon and a heroic security guard were among 10 people killed in an apparent racism-driven rampage by an 18-year-old suspected gunman who had been kicked out of the store the previous night and had taunted police online.

Among the victims identified by Buffalo police were a retired member of the force working security who was hailed as a hero for trying to stop the gunman at the Tops Friendly Markets store. The victims’ ages range from 32 to 86 years old; most were Black, the suspect is white. 

The suspect was identified by authorities as Payton Gendron, 18, of Conklin, New York, about 200 miles east of Buffalo. Gendron would have continued his rampage if he had not been stopped by officers outside the store, Buffalo Commissioner Joseph Gramaglia told ABC News on Monday. 

“We have uncovered information that if he escaped the supermarket, he had plans to continue his attack,” Gramaglia told ABC News. “He had plans to continue driving down Jefferson Ave to shoot more black people … possibly go to another store (or) location.”

Gendron posted threads on the social media platform Discord about body armor and guns, and last month made provocative remarks about federal law enforcement, the Associated Press reported after getting a recording of a call in which the FBI agent in charge for Buffalo, Stephen Belongia, made that statement.

Two months before the shooting, Gendron was casing the same Tops supermarket when he was confronted by a security guard, the Washington Post reported. Gramaglia confirmed the suspect was in Buffalo in early March.

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Here’s what we know:

Tops manager says she asked suspect to leave store the night before