Serbian police on Wednesday (May 3) arrested a seventh-grade student after he shot dead eight fellow pupils and a security guard and wounded his teacher and six other students when he opened fire in his Belgrade classroom, Reuters reports.
The 14-year-old boy student was arrested in the school's yard, the police said.
Officers in helmets and bulletproof vests cordoned off the area around the school.
Casualties are being treated and an investigation into the motives behind shooting is under way, a police statement said.
Mass shootings are comparatively rare in Serbia, which has very strict gun laws and has issued several amnesties for owners to hand in or register illegal guns.
But the western Balkans are awash with hundreds of thousands of illegal weapons following wars and unrest in the 1990s.
