Milan, Lombardy, Italy – Chiara Costanzo, a 16-year-old resident of Milan, is among the individuals reported missing after a devastating fire broke out at the Le Constellation nightclub in Crans Montana, Switzerland, on New Year’s Eve. The tragic incident occurred during New Year’s celebrations, where Costanzo was with friends.
Teenager Disappeared on New Year’s Eve
Chiara Costanzo has not been heard from since the night of December 31, 2025, when she was celebrating at the popular Swiss venue. Her friend, Achille Barosi, is also listed among the missing individuals following the blaze. The families of both teenagers have launched desperate appeals for information.
Who is Chiara Costanzo?
Originally from Arona, Chiara Costanzo resides in Milan with her mother. She is a student at the Moreschi high school and is a passionate and competitive acrobatic gymnast. The family frequently visits Crans Montana, where they own a home. Her parents expressed their anguish, stating that Chiara had chosen the club at the last minute. [lastampa.it](https://www.lastampa.it/novara/2026/01/03/news/chiara_costanzo_dispersa_crans_montana-15454095/)
The search for missing persons, including Chiara and Achille, continues. Social media platforms, such as the Instagram page ‘cransmontana.avisderecherche’, have become central to these efforts, sharing photos and distinguishing features of those still unaccounted for. [milanotoday.it](https://www.milanotoday.it/cronaca/achille-barosi-l-appello-disperato-della-famiglia-per-ritrovare-il-16enne-disperso-a-crans-montana.html)
Investigation Underway
Authorities in Crans Montana are investigating the cause of the fire. The incident has led to widespread concern, particularly for the families of the missing. The hope remains that some of the missing may be among the unidentified patients in hospitals in Sion, Lausanne, or Zurich, as some may have been admitted without identification. [milanotoday.it](https://www.milanotoday.it/cronaca/achille-barosi-l-appello-disperato-della-famiglia-per-ritrovare-il-16enne-disperso-a-crans-montana.html)
This event has cast a somber shadow over the start of the new year, with many families anxiously awaiting news of their loved ones. The community is rallying to support the search efforts and provide comfort to those affected by this tragedy. The stories of those missing, including a bodyguard, a waitress, and young footballers, highlight the diverse group of people impacted by the fire. [repubblica.it](https://www.repubblica.it/cronaca/2026/01/02/news/dispersi_crans_montana_esplosione_constellation-425072584/)
Source: [milanotoday.it](https://www.milanotoday.it/cronaca/chiara-costanzo-crans-montana-.html), [repubblica.it](https://www.repubblica.it/cronaca/2026/01/02/news/chiara-e-la-speranza-appesa-a-un-filo-preghiamo-che-sia-tra-i-ricoverati-425071348/), [lastampa.it](https://www.lastampa.it/novara/2026/01/03/news/chiara_costanzo_dispersa_crans_montana-15454095/)
