A shooting in a St. Louis, Missouri, high school on Monday left three people dead – including the shooter. Seven others were injured as the gunman opened fire inside the Central Visual and Performing Arts High School.

First-year student Raven Terry told local news station KMOV that the shooter walked up to a friend and asked her: “You ready to die?”

“They said it was a student who was doing the shooting,” Terry said of the police response. “We just ran real, real fast… and we were just crying, all shaken up about it.”

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Nylah Jones, a ninth grader at the school, told the St. Louis Post-Dispatch that she was in math class when the shooter fired into her room from the hallway. 

David Williams, a math teacher at the school, recalled that one of the windows of his classroom door was shot out.

Taniya Gholston, 16, told the St Louis Post-Dispatch newspaper that the gunman tried to shoot her.

“I was trying to run and I couldn’t run,” she claimed. “Me and him made eye contact but I made it out because his gun got jammed.”

Gholston said she overheard the attacker saying: “I’m tired of this damn school.”

The city’s police commissioner Michael Sack said the gunman – identified as Orlando Harris – entered the building “in an aggressive, violent manner,” Sack said.

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Seven security guards were in the school at the time of the shooting, but not all of them were armed.

“The security staff did an outstanding job identifying the suspect’s efforts to enter and immediately notified other staff,” Sack said.

The shooter was carrying hundreds of bullets that were sorted into nearly a dozen high-capacity magazines, Sack said in a press conference.

“This is a heart-breaking day for all of us,” he said.

FBI agents are assisting local police in the investigation.