Eight people were killed and thirteen injured in a drive-by shooting in the Serbian village of Dubona, the second mass killing in as many days. Authorities have issued a warrant for a 21-year-old male suspect, who is still on the run. The police have cordoned off an area where they believe the suspect to be hiding. Serbia's Interior Ministry Spokesperson called the attack "a terrorist act", a day after another terrorist attack occurred in a school in Belgrade, killing eight children and a security guard. A 7th-grade student opened fire on his classmates, and police are still trying to ascertain whether there was accomplice(s) in the attack.  The Serbian authorities reported several other incidents on Thursday. These incidents include a student brandishing a plastic gun, and a 9-year-old copying the shooting list of the massacre of the previous day. Serbia is known to have the highest level of civilian gun ownership in Europe, and the fifth-highest in the world, increasing the susceptibility of the country to uncontrolled escalation of violence.