Law enforcement use K-9 dogs to search a nearby neighborhood, after a shooting at Annunciation Church, which is also home to an elementary school, in Minneapolis, Minnesota, U.S. August 27, 2025. REUTERS/Tim Evans
Law enforcement officers gather outside Annunciation Church following a mass shooting event, in Minneapolis, Minnesota, U.S., August 27, 2025. REUTERS/Tim Evans
Law enforcement use a K-9 dog to search a nearby neighborhood, after a shooting at Annunciation Church, which is also home to an elementary school, in Minneapolis, Minnesota, U.S. August 27, 2025. REUTERS/Tim Evans
Families and loved ones reunite outside the police barricades after a shooting at Annunciation Church, which is also home to an elementary school, in Minneapolis, Minnesota, U.S. August 27, 2025. REUTERS/Ben Brewer
Families and loved ones reunite outside the police barricades after a shooting at Annunciation Church, which is also home to a an elementary school, in Minneapolis, Minnesota, U.S. August 27, 2025. REUTERS/Ben Brewer
Law enforcement officers set up barriers after a shooting at Annunciation Church, which is also home to an elementary school, in Minneapolis, Minnesota, U.S. August 27, 2025. REUTERS/Ben Brewer
Law enforcement officers gather outside Annunciation Church following a mass shooting event, in Minneapolis, Minnesota, U.S., August 27, 2025. REUTERS/Tim Evans
Law enforcement officers gather outside Annunciation Church following a mass shooting event, in Minneapolis, Minnesota, U.S., August 27, 2025. REUTERS/Tim Evans

MINNEAPOLIS (Reuters) -A black-clad gunman killed two children and wounded 17 other people on Wednesday, when he opened fire on students attending Mass at a Minneapolis Catholic school, authorities said.

The assailant, a man in his early 20s, fired dozens of rounds through the church windows and then took his own life, officials said. He was armed with a rifle, a shotgun and a pistol, they said.

"This was a deliberate act of violence against innocent children and other people worshiping. The sheer cruelty and cowardice of firing into a church full of children is absolutely incomprehensible," Minneapolis Police Chief Brian O'Hara told reporters.

The shooting occurred two days after school started at Annunciation Catholic School, a private elementary school with about 395 students connected to a Roman Catholic church in a residential area in the southeast part of Minnesota's largest city. Local TV showed parents ducking under yellow police crime tape and leading students out of the school.

Officials said the shooter did not have an extensive criminal history. They did not provide his name and said they were trying to identify a motive.

Law enforcement was investigating multiple online videos to determine if they were posted by the shooter, according to two sources who spoke on condition of anonymity.

Local hospitals said they were treating 15 children and two adults, with many suffering gunshot wounds.

School shootings occur on a regular basis in the U.S., spurring ongoing debates about gun laws and school safety. There have been more than 140 such incidents so far this year, according to the K-12 School Shooting Database.

"Don't just say this is about thoughts and prayers right now. These kids were literally praying. It was the first week of school. They were in a church," Minneapolis Mayor Jacob Frey said at a news conference, visibly angry.

U.S. President Donald Trump said he had been briefed on the shooting and said the FBI was on the scene. "Please join me in praying for everyone involved!" he said on social media.

The U.S. Department of Homeland Security is in touch with local authorities and monitoring the situation, Homeland Security Secretary Kristi Noem said on social media.

There have been three other shootings in the midwestern city since Tuesday afternoon, including one at a Jesuit high school, that have together left three people dead and seven wounded, according to police.

Wednesday's shooting did not appear to be related to the others, O'Hara said.

Minneapolis has experienced a significant rise in homicides in the years following the 2020 police killing of George Floyd, which prompted nationwide protests, civil disturbances and staffing shortages in the city's police department. The city recorded 54 homicides last year, down from 71 in 2021 but well above the 29 recorded in 2019.

In June, Minnesota also experienced an incident of political violence, when a gunman posing as a police officer allegedly assassinated a Democratic state lawmaker and her husband in their home, and wounded another lawmaker and his wife. The suspect was arrested after a massive two-day manhunt and faces state and federal murder charges.

Minnesota state law requires background checks for all gun sales and the state as a whole has a gun death rate below the national average, according to Everytown for Gun Safety, a gun violence prevention group.

(Reporting by Jana Winter, Brendan O'Brien, Andrew Hay, Rich McKay and Brad Brooks ; Writing by Andy Sullivan; Editing by Frank McGurty and David Gregorio)