On August 21, 2024, a school shooting occurred inside the Sanski Most Gymnasium, located in Sanski Most, Bosnia and Herzegovina, when the school janitor, 50-year-old Mehmed Vukalić, opened fire on three school employees with an automatic rifle. After the shooting, he attempted to commit suicide, but was captured while doing so and taken into medical custody.

The incident is currently the deadliest school shooting in Bosnian history.

Small arms and weapons have been frequently trafficked in the Balkans since the Yugoslav Wars. Per a 2010 study executed by the United Nations Development Programme, there were around 750,000 illegally owned weapons in Bosnia and Herzegovina. Mass shootings are a relatively rare occurrence in the Balkans, but they had lately seen a small rise, including the Daruvar shooting in neighboring Croatia and the Mladenovac and Smederevo shootings and Belgrade school shooting, both in neighboring Serbia.

Some school employees reported that the suspect had entered into disputes with the school management and was suffering from Post-traumatic stress disorder after serving in the Bosnian War.

At around 10:15 a.m. on August 21, 2024, the school janitor, 50-year-old Mehmed Vukalić, opened fire on employees with an automatic rifle, killing three people, before attempting to commit suicide by shooting himself in the chest. He survived his self-inflicted wound and was taken into custody.

The deceased victims were identified as:

• Nijaz Halilović, school director
• Gordana Midžan, English teacher
• Nisveta Kljunić, secretary

Vukalić is currently in a non-life-threatening situation, and being held at the University Clinical Center of the Republika Srpska in Banja Luka.

A day after the shooting, Vukalić was in stable condition after undergoing surgery.

A three-day period of mourning was declared in Sanski Most because of the shooting.

• Valparaíso school shootings, a 1999 mass shooting with a similar motive and duplicate fatality count