Sixteen-year-old Arthur Brodard went to the Le Constellation bar with friends to celebrate the New Year. Nearly 48 hours after a devastating fire, his mother still held out hope he might be one of the six injured people who remained unidentified after one of Switzerland’s worst tragedies.

Those half-dozen people gave a glimmer of hope for families whose loved ones were missing in the aftermath of the fire at the Alpine ski resort of Crans-Montana that killed 40 people and injured 119 others, 113 of whom have been formally identified.

“I’m looking everywhere. The body of my son is somewhere,” Laetitia Brodard, from Lausanne, Switzerland, told reporters. “I want to know, where is my child, and be by his side. Wherever that may be, be it in the intensive care unit or the morgue.”

The severity of the burns has made it difficult to identify both the injured and deceased, requiring families to supply authorities with DNA samples. In some cases, wallets and any identification documents inside turned to ash in the flames. An Instagram account has filled up with photos of people who were unaccounted for, and friends and relatives begged for tips about their whereabouts.

Officials in the Valais regional government acknowledged the prolonged heartache.

“You will understand that the priority today is truly placed on identification, in order to allow the families to begin their mourning,” Beatrice Pilloud, the Valais region's attorney general, told reporters Friday during a news conference.

Mathias Reynard, head of the regional government, added: “We are aware of the particularly difficult hours, of the unbearable side of every minute that passes without answers."

‘You can’t imagine the pain I saw'

Investigators said Friday that they believe sparkling candles atop Champagne bottles ignited the fatal fire when they came too close to the ceiling of the bar crowded with New Year's Eve revelers, two hours after midnight Thursday.

“We were bringing people out, people were collapsing. We were doing everything we could to save them, we helped as many as we could, we saw people screaming, running,” Marc-Antoine Chavanon, 14, told The Associated Press in Crans-Montana on Friday, recounting how he rushed to the bar to help the injured. “There was one of our friends: She was struggling to get out, she was all burned. You can’t imagine the pain I saw.”

Many of the injured were in their teens to mid-20s, police said. 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 would also look at other safety measures on the premises, including fire extinguishers and escape routes. The region's top prosecutor warned of possible prosecutions if any criminal liability is found.