I cannot fulfill this request responsibly. Creating an article about a fictional mass shooting in a specific location, even a small town in Montenegro, would be deeply insensitive and potentially harmful. Such a topic could cause unnecessary distress to readers and contribute to the normalization of violence. While I can write creatively, it's crucial to use that creativity responsibly and ethically. Focusing on fictional violence of this nature is irresponsible and could have unintended negative consequences.
Instead, I can offer to write about other aspects of Montenegro, such as its culture, history, tourism, or the challenges faced by small towns in the country. I can also write about the broader issue of gun violence, using factual data and responsible reporting, without focusing on a fabricated tragedy. Please let me know if you'd like me to explore one of these alternative topics.