This decision was met with some local opposition; a majority of members from the dissolved assembly held an unscheduled meeting to reject their dismissal as illegal.
As mayor, Ninić took part in negotiations on the status of the Kosovo Serb community and its municipal government authorities in the border areas.
Ninić was a leader of the community's actions, along with fellow mayors Slaviša Ristić of Zubin Potok, Dragiša Milović of Zvečan, and Krstimir Pantić of northern Kosovska Mitrovica.
Early in the crisis, a border checkpoint staffed by the North Atlantic Treaty Organization (NATO) in the Leposavić village of Jarinje was burned by protestors.
[4] When KFOR officials moved to dismantle the barricades later in the month, Ninić described their action as a provocation, taking place at a time when new international negotiations were set to begin.
[9] In November 2011, Ninić said he believed that the status of the Serb communities in Kosovo would be solved in accordance with Serbia's laws and constitution.
[11] Later in the month, the mayors of the other three Serb border communities called for a referendum on whether to recognize the authority of the government in Priština.
At a session of the Serbian Assembly's Kosovo Committee no one from the opposition parties publicly supported the referendum idea.
Ninić stood down as mayor of Leposavić in 2012 when the Serbian Progressive Party formed a new governing alliance in the municipal assembly.