At least 40 people were killed and 100 others injured after a powerful explosion and fire ripped through a bar in the Swiss ski resort town of Crans-Montana early Wednesday. The incident occurred around 1:30 a.m. during a New Year’s Eve celebration, according to Swiss police cited by Italy’s foreign ministry. The bar, popular among tourists, was crowded with people welcoming the new year when the blast occurred.

Authorities said the explosion is not being treated as an act of terrorism, though the exact cause remains unclear. Emergency services, including police, firefighters, and medical teams, rushed to the scene, supported by several helicopters in the rescue operation. Booths were set up to assist relatives of the victims.

Police have completely sealed off the area and declared a no-fly zone over Crans-Montana to facilitate rescue efforts.