Law enforcement officers assemble near the Covenant School after a shooting in Nashville
Law enforcement officers assemble near the Covenant School after a shooting in Nashville, Tennessee, U.S. March 27, 2023 in a still image from video. WKRN/NewsNation via REUTERS Reuters

A 28-year-old woman armed with several guns opened fire on Monday at a private Christian school she once attended, killing three children and three adults before police killed her, authorities said.

The woman was carrying at least two semi-automatic rifles and a handgun, police said.

The Metropolitan Nashville Police Department began receiving calls at 10:13 a.m. of a shooter at The Covenant School, which teaches elementary school-age children. Officers arriving on the scene reported hearing gunfire coming from the school's second floor, police spokesperson Don Aaron told reporters.

Two officers from a five-member team shot the assailant in a lobby area, and she was pronounced dead by 10:27 a.m..

"The police department response was swift," Aaron said. Police Chief John Drake later described the suspect as a 28-year-old woman from the Nashville area who "at one point was a student at this school." But her identity was not immediately made public.

Deadly mass shootings have become commonplace in the United States in recent years, but a female attacker is highly unusual. Only four of 191 mass shootings cataloged since 1966 by The Violence Project, a nonprofit research center, were carried out by a female attacker.

Reacting to the shooting in Washington, U.S. President Joe Biden urged Congress again to pass more gun reform legislation.

"It's sick," he said, addressing the issue during an event at the White House. "We have to do more to protect our schools so they aren't turned into prisons ... I call on Congress again to pass my assault weapons ban."

Three students were pronounced dead after arriving at Monroe Carell Jr. Children's Hospital at Vanderbilt with gunshot wounds, John Howser, a hospital spokesperson, said in a statement. Three adult staff members were killed by the shooter, police said.

Besides the deceased, no one else was shot, Aaron said.

Students' parents were told to gather at a nearby church.

The Covenant School, founded in 2001, is a ministry of Covenant Presbyterian Church in the Green Hills neighborhood of Nashville with about 200 students, according to the school's website. The school serves preschool through sixth graders and held an active shooter training program in 2022, WTVF-TV reported.

Nashville Mayor John Cooper expressed sympathy for the victims and wrote on social media that his city "joined the dreaded, long list of communities to experience a school shooting."

There have been 89 school shootings - defined as anytime a gun is discharged on school property - in the U.S. so far in 2023, according to the K-12 School Shooting Database, a website founded by researcher David Riedman. Last year saw 303 such incidents, the highest of any year in the database, which goes back to 1970.

Police officers arrive at the Covenant School, Covenant Presbyterian Church, after reports of a shooting in Nashville
Police officers arrive at the Covenant School, Covenant Presbyterian Church, after reports of a shooting in Nashville, Tennessee, U.S. March 27, 2023. Metropolitan Nashville Police Department/Handout via REUTERS. Reuters
A police officer speaks with a woman at a family reunification center after a mass shooting in Nashville
A police officer speaks with a woman at a family reunification center after a mass shooting at the Covenant School in Nashville, Tennessee, U.S. March 27, 2023. Reuters
Mario Dennis, one of the kitchen staff at the Covenant School, reacts after a shooting in Nashville
Mario Dennis, one of the kitchen staff at the Covenant School, reacts near a police officer after a shooting at the facility in Nashville, Tennessee, U.S. March 27, 2023. Reuters
Children run past an ambulance near the Covenant School after a shooting in Nashville
Children run past an ambulance near the Covenant School after a shooting in Nashville, Tennessee, U.S. March 27, 2023 in a still image from video. WKRN/NewsNation via REUTERS Reuters
Three children killed in Nashville school shooting, suspect dead
Police officers secure the entrance to the Covenant School, Covenant Presbyterian Church, after reports of a shooting in Nashville, Tennessee, U.S. March 27, 2023. Reuters