CNN —A boy was arrested on Wednesday after allegedly opening fire in an elementary school in the Serbian capital Belgrade, authorities said. Five children were wounded in the incident, CNN affiliate N1 reported, before a seventh-grade student – typically aged 12 or 13 – was placed under arrest. The Serbian Ministry of Internal Affairs said in a statement on Facebook that it was informed at 8.40 a.m. local time (2.40 a.m. ET) that a school shooting had occurred at the Vladislav Ribnikar Elementary School in Vračar, an upscale area of the Serbian capital. It will be updated…

---