Police have arrested a 14-year-old student at the Vladislav Ribnikar school in central Belgrade in connection with this morning’s attack.

The suspect is alleged to have used his father’s gun, officials say, and an investigation into the motives behind the incident is under way. We’ve had the following picture of what is believed to be the suspect being escorted by police after his arrest:

Aleksandar Miladinovic, BBC reporter in Belgrade, has been relaying the latest about what’s been unfolding in the Serbian capital.

He says the shooting happened at one of the most prestigious primary schools in the capital, during a history class. Six very young pupils from the same class and their history teacher are in different hospitals in Belgrade being treated for their wounds, he says.

“This is the first event of this kind in Serbia and in the Balkans.”

He says there’s been a lot of debate about whether the weapons and arms belonging to people in the Balkans, after the wars in the 1990s, are listed and registered, and how that information is kept and stored.

“This event will certainly open a big discussion on what has been done in the past,” he says, adding there’s been a lot of shock and a lot of silence since the incident.

Police officers and emergency services have cordoned off the area around the school where the shooting happened.

Milan Milosevic, the father of one of the pupils at the school, said his daughter was in the class where the gun was fired and managed to escape.

“[The boy] first shot the teacher and then he started shooting randomly,” Milosevic told broadcaster N1.

“I saw the security guard lying under the table. I saw two girls with blood on their shirts. They say he [the shooter] was quiet and a good pupil. He recently joined their class.”

The shooting started at around 08:00 local time at the Vladislav Ribnikar school, in Belgrade’s central Vracar district.

Officers arrested a 14-year-old boy and took him away from the scene, with his hands cuffed and his head covered with a jacket.

The suspect’s classmates say he walked into a History class, first shot the teacher and then turned his weapon on his fellow students.

He also allegedly shot at least one security guard who tried to prevent him entering the school.

The incident is causing enormous shock in Serbia.