A top-level meeting in Montenegro on Friday looked for ways to curb illegal weapons after a gunman fatally shot 12 people in a second such tragedy in less than three years in the small Balkan country.

The New Year’s Day shooting shocked a country where gun ownership is widespread. Montenegro’s government began a three-day mourning period Thursday after a gunman opened fire on New Year’s Day — killing 12 people, including two children, across several locations.

Officials say a gunman opened fire at multiple locations in Montenegro, killing a dozen people before turning the gun on himself.