An official said the sparklers were attached to bottles of champagne held too close to the ceiling. Forty people died and more than 100 were injured. Many of the victims were teenagers.

Investigators are looking into the insulation foam used on the ceiling of the venue

The ‌bodies ​of four more ‌people who died in the fire ​that killed 40 people at a bar in ‍Switzerland on New Year's ​Eve have been identified, cantonal ​police said. Two ⁠Swiss women aged 24 and 22 along with two Swiss men aged 21 and 18 have been identified and their bodies have been ‌returned to their families,

Police initiated a criminal case over the inferno, which killed 40 and injured 119, and said they were focused on champagne sparklers, venue capacity and building materials.