10 dead, 3 injured in racially motivated shooting at Buffalo supermarket: What we know

— Vigils, prayer services and rallies were held across the city Sunday after authorities said a teenage gunman, wearing tactical gear and a livestreaming camera, killed 10 people and wounded three more in a hate-fueled shooting rampage at a busy supermarket.Eleven of the 13 people who were shot Saturday at the Tops Friendly Markets were Black, Buffalo Police Commissioner Joseph Gramaglia said. “This individual came here with the express purpose of taking as many Black lives as he could,” Buffalo Mayor Byron Brown said at a news conference Sunday.Gendron threatened an attack at his high school last year, resulting in a referral for a mental health evaluation, a law enforcement official told USA TODAY on Sunday. Federal agents interviewed Gendron's parents and were working to confirm the authenticity of a 180-page manifesto that was posted online, a law enforcement official told The Associated Press on Sunday.The manifesto detailed the plot and identified Gendron by name as the gunman, said the official, who is not authorized to publicly discuss details of the investigation and spoke to AP on condition of anonymity.Authorities say the shooting was motivated by racial hatred.RACIST, EXTREMIST VIOLENCE:Buffalo attack highlights most lethal domestic threatFROM OKLAHOMA CITY TO JAN. Gendron threatened the shooting at Susquehanna Valley High School around the time of graduation, said the law enforcement official, who was not authorized to speak publicly on the investigation and did so on the condition of anonymity.New York State Police said troopers were called to the school on June 8, 2021, for a report that a 17-year-old student had made threatening statements.