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.

As flames tore through a 12-story hotel at a popular ski resort in northwestern Turkey, friends Esra Karakisa and Halime Cetin watched helpless as the horror unfolded before them, with people leaning out of smoke-filled rooms pleading for help and others making the harrowing decision to jump.