"High school student D.U. from the northern Serbian town of Subotica was preparing a bomb attack against a kindergarten," Belgrade radio B92 reported.

"The arrest of the teenager was made after officials of the US Federal Bureau of Investigation (FBI) discovered how he had created accounts on social networks with the names of perpetrators of mass murder. Also, the student had searched for information on the Internet about making improvised explosive devices," the media added.

"The service in the USA filed a report with the Serbian Ministry of the Interior and the police arrested the student. He told the interrogators that he wanted to detonate a bomb in a kindergarten," the radio said.

"During the actions of the guardians of the law, pornographic materials were also found in D.U.'s computer and phone. Some of the photos and video footage were of children," B92 added.

"The high school student was placed under house arrest and a tracking bracelet was placed on his leg," the media outlet added.

The father of the boy who killed nine people in Serbia: I am not responsible for the attack