Hopes of finding survivors were fading more than 36 hours after the avalanche took place. Three people from the Czech Republic were among those unaccounted for.
Sunday’s avalanche took place on the Marmolada, which at more than 3,300 meters (10,830 ft) is the highest peak in the Dolomites, a range in the eastern Italian Alps straddling the regions of Trento and Veneto.
With the peak still unstable, rescuers have been using drones and helicopters to look for victims or to try to locate them through their mobile phone signals.
Italian media said those confirmed to have been killed included Davide Miotti, a 51-year-old local alpine guide who ran a sports shop in the area.
By Guglielmo Mangiapane and Roberto Mignucci