15-year-old student shoots teacher, three students and himself

A 15-year-old student opened fire with a gun, injuring three students and a teacher before turning the gun to kill himself on wednesday at an American school in Monterrey, northern Mexico.

Read Details:
Fox news reported that the shooter died at a hospital and three of the victims are "fighting between life and death," as they were all shot in the head. The entire scene was captured by a surveillance camera.

The chilling video shows the shooter, identified just as Federico, opening fire from his desk first. He hits one classmate, who is seen collapsing to the floor, and then walks around the room shooting randomly. After a few seconds he pauses and takes the gun, a 22 caliber pistol, to his head.