Crans-Montana, Switzerland — A Mass was held Sunday for victims of the New Year's Eve fire at a bar in the Swiss Alpine resort of Crans-Montana that left 40 dead and many severely injured, as distressed parents waited for news of their children or began the long process of mourning.

By Sunday evening, Swiss authorities had identified all of the 40 fatalities. The dead include 18 Swiss citizens aged 14 to 31 years, two Italians aged 16, one dual citizen of Italy and the United Arab Emirates, also 16 years old, an 18-year-old Romanian, a 39-year-old French and a Turkish citizen, 18.

In addition to the 40 who died, 119 were injured in the blaze that broke out around 1:30 a.m. on Thursday at Le Constellation bar. Police have said many of the victims were in their teens to mid-20s.

Gray-haired parents, teenagers and members of the police were seen comforting one another during the service, which took place at the Chapelle Saint-Christophe in Crans-Montana. Mass was followed by a silent march to the site of the tragedy.

In the crowded pews, a grieving woman listened intently, her hands clasped tightly and sometimes clasping rosary beads, as speakers delivered readings in German, French and Italian. Despite freezing weather, several hundred followed the Mass on the screen installed outside the church.

The Rev. Gilles Cavin spoke of the "terrible uncertainty" for families unsure if their loved ones are among the dead or still alive, among the injured. "We pray for their friends hard hit by misery on this day that was meant to be one of festivities and friendship," he said.

One of the victims was 16-year old Arthur Brodard, whose mother had been frantically searching for him.

"Our Arthur has now left to party in paradise," a visibly shaken Laetitia Brodard said in a Facebook story posted on Saturday night, speaking to the camera. "We can start our mourning, knowing that he is in peace and in the light."

Brodard's frenzied search for her son reflected the desperation of families of the young people disappeared during the fire, who didn't know whether their loved ones were dead or in the hospital.

Swiss authorities said the process of identifying victims was particularly hard because of the advanced degree of the burns, requiring the use of DNA samples. Brodard also had given her DNA sample to help in the identification process.

In her Facebook post, Brodard thanked those who "testified their compassion, their love" and to those who shared information as she anxiously searched and waited for news of her son. 

Other parents and siblings are still waiting in anguish.

Swiss authorities have opened a criminal investigation into the bar's managers. In a statement on Sunday, regional police said there were no legal grounds so far that would require the managers to be held pending the legal process. They have not been deemed to be a flight risk.

The two are suspected of involuntary homicide, involuntary bodily harm and involuntarily causing a fire, the Valais region's chief prosecutor, Beatrice Pilloud, told reporters Saturday. The announcement of the investigation didn't name the managers.

 
Investigators had said they believe sparkling candles atop Champagne bottles ignited the fire when they came too close to the ceiling of the crowded bar.

"Initial witness accounts cited a fire that spread quickly, generating a lot of smoke and a huge wave of heat," the police statement Sunday said. "Everything happened very fast." 

Authorities planned to look into whether sound-dampening material on the ceiling conformed with regulations and whether the candles were permitted for use in the bar. Officials said they also would look at other safety measures on the premises, including fire extinguishers and escape routes.

Swiss President Guy Parmelin announced a national day of mourning for the victims on Jan. 9.

France's Health Minister Stéphanie Rist said 17 patients have received care in France, out of a total of 35 transferred from Switzerland to five European countries. Other patients were planned to be transferred to Germany, Italy and Belgium.