MINNEAPOLIS — A shooter opened fire with a rifle Wednesday through the windows of a Catholic church in Minneapolis and struck children celebrating Mass during the first week of school, killing two and wounding 17 people in an act of violence the police chief called “absolutely incomprehensible.”

Armed with a rifle, shotgun and pistol, 23-year-old Robin Westman approached the side of the church and shot dozens of rounds through the windows toward the children sitting in the pews during Mass at the Annunciation Catholic School just before 8:30 a.m., Minneapolis Police Chief Brian O’Hara said at news conferences. He said the shooter then died by suicide.

The children who died were 8 and 10. Fourteen other kids and three octogenarian parishioners were wounded but expected to survive, the chief said.

Fifth-grader Weston Halsne told reporters he ducked for the pews, covering his head, shielded by a friend who was lying on top of him. His friend was hit, he said.

“I was super scared for him, but I think now he’s okay,” the 10-year-old said, adding that he was praying for the other hospitalized children and adults.

Halsne’s grandfather, Michael Simpson, said the violence during Mass on the third day of school left him wondering whether God was watching over.

“I don’t know where He is,” Simpson said.

FBI Director Kash Patel said on X that the shooting is being investigated as an act of domestic terrorism and a hate crime targeting Catholics.

O’Hara said police hadn’t yet found any relationship between the shooter and the church, nor determined a motive for the bloodshed. The chief said, however, that investigators were examining a social media post that appeared to show the shooter at the scene.

“The sheer cruelty and cowardice of firing into a church full of children is absolutely incomprehensible,” said O’Hara, who gave the wounded youngsters’ ages as 6 to 15. He said a wooden plank was placed to barricade some of the side doors, and that authorities found a smoke bomb at the scene.

On a YouTube channel titled Robin W, the alleged shooter released at least two videos before the channel was taken down by site administrators Wednesday.

In one, the alleged shooter shows a cache of weapons and ammunition, some with such phrases as “kill Donald Trump” and “Where is your God?” written on them.

A second video shows the alleged shooter pointing to two outside windows in what appears to be a drawing of the church, and then stabbing it with a long knife. It was unclear when that video was uploaded to the channel.

Westman’s uncle, former Kentucky state lawmaker Bob Heleringer, said he did not know the accused shooter well. He said he last saw Westman at a family wedding a few years ago and was confounded by the violence: “It’s an unspeakable tragedy.”

The police chief said Westman did not have an extensive known criminal history and is believed to have acted alone.

Federal officials referred to Westman as transgender, and Minneapolis Mayor Jacob Frey decried hatred being directed at “our transgender community.” Westman’s gender identity wasn’t clear. In 2020, a judge approved a petition, signed by Westman’s mother, asking for a name change from Robert to Robin, saying the petitioner “identifies as a female and wants her name to reflect that identification.”

Frey said the violence had forever changed the students' families and the city along with them.

“Don’t just say this is about thoughts and prayers right now,” Frey said at a news conference. “These kids were literally praying."

Bill Bienemann, who lives a couple of blocks away and has long attended Mass at Annunciation Church, said he heard as many as 50 shots over as long as four minutes.

“I was shocked. I said, ‘There’s no way that could be gunfire,’” he said. Bienemann's daughter was an alumna of the kindergarten-to-eighth-grade school.

The police chief said officers immediately responded to reports of the shooting, entered the church, rendered first aid and rescued some of the children hiding throughout the building as other emergency responders arrived.

The school was evacuated and students' families later were directed to a “reunification zone” there. Outside, amid a heavy uniformed law enforcement presence, children in dark green uniforms trickled out of the school with adults, giving lingering hugs and wiping away tears.

Aubrey Pannhoff, a 16-year-old student at a different Catholic school, stood crying just outside the police cordon. She had rushed to Annunciation after her own school's lockdown and prayer service, and she said she was asking God: “Why?”

“It's little kids,” she said. “It's just really hard for me to take in.”

Minnesota Gov. Tim Walz called the violence “horrific” and his state is heartbroken in posts on X. On Truth Social, President Donald Trump said he was briefed on the shooting. The White House later said Trump spoke with Walz. The governor was the Democratic vice presidential nominee in last year's election against Trump's running mate, now Vice President JD Vance, a Republican.

From the Vatican, Pope Leo XIV sent a telegram of condolences. The Chicago-born Leo, history's first American pope, said he was praying for relatives of the dead.

Democratic officials from around country were meeting in Minneapolis, and Democratic National Committee Chairman Ken Martin told the gathering what was happening and said it was “a tragic day for Minnesotans.”

Hennepin Healthcare, the main trauma hospital in Minneapolis, said it received 10 patients, including eight children — aged 6 through 14 — and two adults. Seven were considered to be in critical condition. Children's Minnesota, a pediatric trauma hospital, said it admitted seven children, ages 9 through 16.

The Catholic Diocese of Pittsburgh issued a statement in response to the shooting, noting a particularly close relationship between Pittsburgh and Minneapolis.

“We are devastated by the horrific violence that shattered what should have been a holy moment of grace at Annunciation Catholic Church in Minneapolis, where children had gathered for a back-to-school Mass,” the statement from Pittsburgh Bishop Mark Eckman read. “We hold close in prayer the students, families, teachers, parish community, and first responders. We ask the Lord to bring healing to the injured, eternal rest to those who have died, and consolation to all who mourn.

“This story touches our local Church in a particular way. Archbishop Bernard Hebda, who shepherds the Archdiocese of Saint Paul and Minneapolis, is a native son of the Diocese of Pittsburgh. We hold him, the victims, and their grieving families in our hearts.”

Monday had been the first day of the school year at Annunciation, a 102-year-old school in a leafy residential and commercial neighborhood about 5 miles south of downtown Minneapolis. Recent social media posts from the school show children smiling at a back-to-school event, holding up summer art projects, playing together and enjoying ice pops.

Karin Cebulla, who said she had worked at the school and sent her two now-college-aged daughters there, said Wednesday she had “never met such authentic, accepting, loving, gracious people” as she did there.

The gunfire was the latest in a series of fatal shootings in the city in less than 24 hours. One person was killed and six others were hurt in a shooting Tuesday afternoon outside a high school in Minneapolis. Hours later, two people died in two other shootings in the city.

O'Hara, the police chief, said the Annunciation shooting does not appear to be related to other recent violence. Still, Dr. Thomas Wyatt, the Hennepin Healthcare emergency medicine chief, noted the toll of responding to two mass-casualty shootings in 24 hours.

Wednesday's school shooting also followed a spate of hoax calls about purported shootings on at least a dozen U.S. college campuses. The bogus warnings, sometimes featuring gunshot sounds in the background, prompted universities to issue texts to “run, hide, fight” and frightened students around the nation as the school year begins.