Police officers block the street near the scene of a Thursday night attack in the village of Dubona, some 50km south of Belgrade, Serbia, Friday, May 5, 2023.

Source: https://www.channelnewsasia.com/world/serbia-second-mass-shooting-eight-killed-elementary-school-3466591?cid=cna_flip_070214

The incident took place at around 11 p.m. on Thursday night in Dubona and Interior Minister Bratislav Gasic identified the 21-year-old suspect as Uros B, who is currently absconding.

Source: https://ummid.com/news/2023/may/05.05.2023/serbia-reports-2nd-mass-shooting-within-a-day.html

"We heard gunshots in the evening, but I thought it was fireworks, children fooling around," Zvonko Mladenovic, a Dubona resident, told AFP.

Source: https://www.france24.com/en/europe/20230505-eight-fatally-shot-in-serbia-town-a-day-after-9-killed-at-school