Serbia school shooting: 13-year-old arrested after killing 9 in "planned" attack

A 13-year-old boy is in custody after he gunned down his classmates in a Belgrade school on Wednesday morning in a pre-planned attack, Serbian officials said.

Using two handguns that belonged to his father, the boy shot eight students dead, and a security guard, and wounded seven others.

"It looks a little as if it's from a video game, or a horror film, which indicates that he planned in detail how to enter which classroom and how to execute each child," Belgrade police Veselin Milic said during a press conference.