Local police chief, Captain Campos said the authorities did not know what had caused the incident, but no-one was injured.


"A police car was called to the Colégio da Imaculada Conceição school, at about 9:00 this morning, but the two teachers had already convinced the boy to hand over the weapon and ammo", he said.


The 32mm "Tauros" revolver was loaded.


The police took the youth to Coimbra Pediatric Hospital for an assessment.