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 worshipping. 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. Police and first responders work at the sce...