Serbia's government has expressed "outrage" after a "Red Star" Belgrade basketball fan was stabbed to death in Istanbul.
A government statement said that Serbian Prime Minister Aleksandar Vucic was incensed "over the monstrous murder."
It added, "Serbia demands that the perpetrator be urgently "found, arrested and most severely punished."
Turkish Prime Minister Ahmet Davutoglu called Vucic to offer condolences over the death of 25-year-old Marko Ivkovic during a fight between Turkish and Serbian fans on the evening of November 21.
Davutoglu voiced regret over the killing of Ivkovic and pledged that Turkish authorities would do everything they could to find the perpetrator.
Ivkovic was stabbed in the chest during a fight between "Red Star" and "Galatasaray" supporters in front of the stadium where the match was played.
Based on reporting by AFP and Reuters