A gunman has killed three staff members after opening fire with an automatic weapon at a school in Bosnia, local media reported.
Three employees of a secondary school in the western town of Sanski Most were killed when a man who also worked at the school opened fire around 10:15 a.m., according to regional police.
A fourth person, believed to be the attacker, was seriously injured. Bosnian media reported that he attempted suicide after the attack.
The injured person was taken by ambulance to a local hospital, where he is said to be in serious condition.
Police and emergency services are on site.
The shooter is believed to have been a janitor at the school, Bosnian media reports, while the victims have been identified as the school principal, secretary and a female teacher. The details of those involved have not been confirmed by the police.
The shooting took place at a high school in the western Bosnian town of Sanski Most