Two children are dead and more than a dozen others wounded after a gunman dressed in all black fired on a Catholic school in Minneapolis during Mass. The gunman is also dead, police said.

Just before 8:30 a.m., officers with the Minneapolis Police Department responded to reports of a shooting at Annunciation Church.

“During the Mass, a gunman approached on the outside of the building and began firing a rifle through the church windows towards the children sitting in the pews at the Mass,” Minneapolis Police Chief Brian O’Hara said at a press conference Wednesday afternoon.

The City of Minneapolis said in a public safety alert that by 9:30 a.m. local time, the shooter had been “contained” and there was no longer an active threat to the community.

The gunman, who has not yet been identified, was armed with a rifle, shotgun and pistol. Police said he fired each weapon and was later found dead toward the back of the church from a self-inflicted gunshot wound.