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Police officers guard a scene where unknown assailants opened fire on Kosovo Serb politician Oliver Ivanovic in front of his office in the northern, Serb-dominated part of Mitrovica, Kosovo, Tuesday, Jan. 16, 2018. The Kosovo government has strongly denounced the slaying of a leading Serb politician in northern Mitrovica and says it considers it to be a challenge to "the rule of law". (AP Photo/Bojan Slavkovic)
- Bojan Slavkovic

Police officers inspect a scene where unknown assailants opened fire on Kosovo Serb politician Oliver Ivanovic in front of his office in the northern, Serb-dominated part of Mitrovica, Kosovo, Tuesday, Jan. 16, 2018. The Kosovo government has strongly denounced the slaying of a leading Serb politician in northern Mitrovica and says it considers it to be a challenge to "the rule of law". (AP Photo/Bojan Slavkovic)
- Bojan Slavkovic

Police officers secure the scene where unknown assailants opened fire on Kosovo Serb politician Oliver Ivanovic in front of his office in the northern, Serb-dominated part of Mitrovica, Kosovo, Tuesday, Jan. 16, 2018. The Kosovo government has strongly denounced the slaying of a leading Serb politician in northern Mitrovica and says it considers it to be a challenge to "the rule of law". (AP Photo/Bojan Slavkovic)
- Bojan Slavkovic

FILE - In this Feb. 22, 2017 file photo, Kosovo Serb politician Oliver Ivanovic, center, leaves the prison in the northern, Serb-dominated part of Mitrovica, Kosovo. 64-year old Ivanovic has died from wounds after being shot by unknown assailants Tuesday Jan. 16, 2018, according to his lawyer Nebojsa Vlajic. (AP Photo/Bojan Slavkovic, FILE)
- Bojan Slavkovic

FILE - In this Oct. 23, 2004 file photo, Kosovo Serb politician Oliver Ivanovic casts his ballot during general elections in the Serb-dominated part of Mitrovica, Kosovo. 64-year old Ivanovic has died from wounds after being shot by unknown assailants Tuesday Jan. 16, 2018, according to a statement from his lawyer Nebojsa Vlajic. (AP Photo/Darko Vojinovic, File)
- Darko Vojinovic

Police officers secure the scene where unknown assailants opened fire and killed Kosovo Serb politician Oliver Ivanovic in front of his office in the northern, Serb-dominated part of Mitrovica, Kosovo, Tuesday, Jan. 16, 2018. The Kosovo government has strongly denounced the slaying of a leading Serb politician in northern Mitrovica and says it considers it to be a challenge to "the rule of law". (AP Photo/Bojan Slavkovic)
- Bojan Slavkovic
Leading Kosovo Serb politician shot and killed in Mitrovica
- By GORAN DANILOVIC Associated Press
- Updated