A teenager shot dead two staff members and injured two other people, including an 11-year-old girl, on Tuesday in the latest school shooting to rock Brazil. A 13-year-old boy was arrested over the attack at São José Institute, a junior high school in Rio Branco, capital of northwestern Acre state, the local government said. The injured girl was shot in the leg. The teenager, who is a student at the school, entered the building and fired several shots in a hallway leading to the principal’s office, Lieutenant Colonel Felipe Russo of the Acre military police department told reporters. He surrendered to police after the attack.