Funeral services were held on May 6 in Belgrade for Dragan Vlahovic, a security guard who was killed along with eight pupils at an elementary school near the Serbian capital three days ago. Police said a 13-year-old pupil, identified only as K.K., was being held after the shooting. The killings, followed the next day by a second mass shooting near the capital that killed eight people, shocked the people of the Balkan nation. President Aleksandar Vucic has promised tough new anti-gun measures in the wake of the killings. To read the original story by RFE/RL's Balkan Service, click here.