At least eight people have been killed and 13 people injured in a drive-by shooting near Serbia’s capital Belgrade.
The attacker used an automatic weapon to shoot randomly at people near the town of Mladenovac which is around 30 miles south of the city on Thursday night, state TV reported.
It later reported that the suspected gunman, a 21-year-old identified only as U.B, has been arrested following a manhunt dubbed Operation Whirlwind.
The minister of police, Bratislav Gasic, said he was treating the shooting as a terrorist attack.
Radio Television of Serbia (RTS) said the youngest person reported to have been killed was born in 2008.
They also said 600 special unit officers are involved in the search operation which is using helicopters and thermal imaging cameras to try and find the suspect.
The shooting came a day after a 13-year-old boy used his father's guns to kill eight fellow students and a guard at a school in Belgrade.
Dozens of Serbian students, many wearing black and carrying flowers, paid silent homage on Thursday to peers killed a day earlier.
The students filled the streets around the school in central Belgrade as they streamed in from all over the city.
Though Serbia has no shortage of weapons left over from the wars of the 1990s, mass shootings are extremely rare.
Wednesday's school shooting was the first in the country's modern history. The last mass shooting before this week was in 2013, when a war veteran killed 13 people in a central Serbian village.
The tragedy sparked a debate about the general state of the nation following decades of crises and conflicts which has created a state of permanent insecurity and instability, along with deep political divisions.
Authorities on Thursday moved to boost gun control, as police urged citizens to lock up their guns and keep them safe, away from children.
