As flames tore through a 12-story hotel at a popular ski resort in northwestern Turkey, friends Esra Karakisa and Halime Cetin stood 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.

A fire at the Grand Kartal Hotel in Turkey’s Bolu mountains killed 66 people and injured 51. The fire broke out early Tuesday, and many guests panicked, jumping from windows to escape. Emergency responders surrounded the hotel as guests used bed sheets to try to flee.