Switzerland observed a national day of mourning for the 40 victims of a New Year's Eve bar fire in Crans-Montana. Prosecutors requested pre-trial detention for Jacques Moretti, co-owner of the "Le Constellation" bar, citing a flight risk. His wife and co-owner, Jessica Moretti, remains free under judicial supervision. The couple, French nationals, face charges including involuntary homicide and causing a fire. The tragedy also left 116 injured, with victims of various nationalities.