The suspect is 16-year-old Albanian Adem Dibrani from a village in Kosovska Mitrovica municipality.
Nine people were injured in the bomb attack.
The local media report that Dibrani suffers from hemophilia and quote his parents as saying that he suffered memory loss after a brain operation more than a year ago.
The outgoing commander of the Kosovo Force, Guiseppe Valotto, said that the attack was an isolated incident which did not reflect the reality in Kosovo.