A teenager injured in the New Year's Eve fire at a Swiss bar has died, raising the death toll to 41. The 18-year-old Swiss national succumbed to injuries on January 31, a month after the blaze at Le Constellation bar in Crans-Montana. The fire, which injured 116 people, is believed to have started when sparklers on champagne bottles ignited soundproof foam on the ceiling. Most victims were teenagers, with eight under 16. The bar had not undergone safety checks for five years. Authorities are investigating the owners, Jacques and Jessica Moretti, for negligence. The couple faces charges of manslaughter, bodily harm, and arson by negligence. Jessica Moretti is under a travel ban, while Jacques was initially detained but later released on bail. The fire has left 44 patients receiving treatment abroad, including in France, Italy, Germany, and Belgium. The investigation is ongoing, with no further details released by prosecutors.