but this is serbia s capital, belgrade. this is the deadliest mass shooting in the country in over a decade. moments after arriving, the prestigious vladislav elementary school, a 13 year old student took out his father s gun and shot the security guard before turning it on peoples, according to officials. translator: there was one girl at her desk, another at the piano. he took their lives. then he went out into the corridor into the history classroom. he went into the classroom and immediately shot the teacher and the students there from the door. according to eyewitnesses, the boy shot the female history teacher as terrified students hid under their desks. she was rushed to hospital, along with six injured children, according to cnn affiliate n1. the hospital director detailed severe brain injuries and gunshot wounds to the legs. the perpetrator was arrested in the school yard and led out in