A waitress who was in serious condition after jumping out of a burning hotel at a popular ski resort has succumbed to her injuries, officials and reports said Thursday, becoming the latest victim of a tragedy that has shocked the nation and revived concerns over lax safety regulations in the country.

Witnesses have described standing helplessly and paralyzed by the horror of people screaming for help or jumping out of windows as flames tore through a 12-story hotel at a popular ski resort.

Authorities in Turkey have detained 11 people they said are involved in the fire that killed 79 people and injured dozens at a ski resort in the Bolu mountains. The fire occurred at the Grand Kartal H