After the fight, a man identified as 45-year-old Aco Martinović (Montenegrin: Ацо Мартиновић) left the scene and returned to his home to get his gun.

After being surrounded by police,[7] the suspect shot himself in the head near his home, in the Cetinje suburb of Humci, and died while being transported to a hospital[8][9] on the morning of 2 January.

[14] Among the victims were two relatives of singer and Zvezde Granda winner Darko Martinović, the bar owner's nephews, family members of the perpetrator, including his sister, and other people that he knew.

[16] President Jakov Milatović said he was shocked and stunned by the tragedy, tweeting that "Instead of holiday joy ... we have been gripped by sadness over the loss of innocent lives".

Prime Minister Milojko Spajić visited the hospital where some of the victims were being treated, and announced three days of national mourning[6] and the cancellation of scheduled New Year celebrations.