The families of teenagers missing after a fire at a bar in a Swiss ski resort are facing an agonising wait for official news and appealing for information about their loved ones online.

The blaze ripped through Le Constellation bar in Crans-Montana, in the Alps in south-west Switzerland, in the early hours of New Year's Day. Verified images show the ceiling catching alight as bottles with sparklers are held aloft.

Swiss authorities have said it could take days if not weeks to identify the victims of the fire, which killed 40 people and injured another 119. Officials said on Friday that 113 of the injured had been identified, with authorities still working to identify the other six.

In the meantime, families and friends have been taking to social media to appeal for information about their loved ones who were at the bar that night.

The whereabouts of Swiss national Arthur Brodard, 16, are currently unknown, according to an appeal from his mother, Laetitia.