By SCOTT BAUER Associated Press

MADISON, Wis. (AP) — A 15-year-old student opened fire inside a study hall at a small Christian school in Wisconsin, killing a teacher and a teenager and prompting a swarm of police officers to descend on the school in response to a second grader’s 911 call.

The girl also wounded six others in Monday’s shooting at Abundant Life Christian School, including two students who were in critical condition, Madison Police Chief Shon Barnes said. A teacher and three students were taken to a hospital with less serious injuries, and two of them were later released.

“Every child, every person in that building is a victim and will be a victim forever. … We need to figure out and try to piece together what exactly happened,” Barnes said.

Police said the shooter, identified as Natalie Rupnow, was found with a self-inflicted gunshot wound when officers arrived and died en route to a hospital. Barnes declined to offer additional details about the shooter, partly out of respect for the family.

Abundant Life is a nondenominational Christian school — prekindergarten through high school — with approximately 420 students in Madison, the state capital.

Barbara Wiers, the school’s director of elementary and school relations, said when they practice safety routines, leaders always announce that it’s a drill. That didn’t happen Monday, just a week before Christmas break.

“When they heard, ‘Lockdown, lockdown,’ they knew it was real,” she said.

Wiers said the school does not have metal detectors but uses other security measures including cameras.

A motive for the shooting was not immediately known, nor was it clear if the victims were targeted, Barnes said.

“I don’t know why, and I feel like if we did know why, we could stop these things from happening,” he told reporters.

Barnes said police were talking with the shooter’s father and other family members, who were cooperating, and searching the shooter’s home.

“He lost someone as well,” Barnes said of the shooter’s father. “And so we’re not going to rush the information. We’ll take our time and make sure we do our due diligence.”

The first 911 call to report an active shooter came in shortly before 11 a.m. First responders who were in training just 3 miles (about 5 kilometers) away dashed to the school for an actual emergency, Barnes said. They arrived three minutes after the initial call.

Investigators believe the shooter used a 9mm pistol, a law enforcement official told The Associated Press. The official spoke on the condition of anonymity because they were not authorized to discuss the ongoing investigation.

Police blocked off roads around the school, and federal agents were at the scene to assist local law enforcement. No shots were fired by police.

Children and families were reunited at a health clinic about a mile (1.6 kilometers) from the school. Parents pressed children against their chests while others squeezed hands and shoulders as they walked side by side.

Abundant Life asked for prayers in a brief Facebook post. Wiers said they’re still deciding whether they will resume classes this week.

Bethany Highman, the mother of a student, rushed to the school and learned over FaceTime that her daughter was OK.

“As soon as it happened, your world stops for a minute. Nothing else matters,” Highman said. “There’s nobody around you. You just bolt for the door and try to do everything you can as a parent to be with your kids.”

In a statement, President Joe Biden cited the tragedy in calling on Congress to pass universal background checks, a national red flag law and certain gun restrictions.

“We can never accept senseless violence that traumatizes children, their families, and tears entire communities apart,” Biden said. He spoke with Wisconsin Gov. Tony Evers and Madison Mayor Satya Rhodes-Conway and offered his support.

Evers said it’s “unthinkable” that a child or teacher would go to school and never return home.

The school shooting was the latest among dozens across the U.S. in recent years, including especially deadly ones in Newtown, Connecticut; Parkland, Florida; and Uvalde, Texas.

The shootings have set off fervent debates about gun control and frayed the nerves of parents whose children are growing up accustomed to doing active shooter drills in their classrooms. But school shootings have done little to move the needle on national gun laws.

Firearms were the leading cause of death among children in 2020 and 2021, according to KFF, a nonprofit that researches health care issues.

Rhodes-Conway said the country needs to do more to prevent gun violence.

“I hoped that this day would never come to Madison,” she said.

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Associated Press writers Alanna Durkin Richer, Ed White, Josh Funk and Hallie Golden and photographer Morry Gash contributed to this report.