A fire at a hotel at a ski resort in northwestern Turkey on Tuesday killed at least at least 10 people and hospitalized 32 others, officials said.

The fire started in the restaurant of the 12-story Grand Kartal hotel in Kartalkaya resort, Bolu province, around 3:30 a.m., according to officials and reports.

There were no immediate reports of casualties, and the cause of the fire was not immediately clear.

The cause of the fire was under investigation.

Two of the victims died after jumping from the building in a panic, Gov. Abdulaziz Aydin told the state-run Anadolu Agency.

Private NTV television said some people tried to climb down from their rooms using sheets and blankets.

There were 234 guests staying at the hotel, Aydin said.

Necmi Kepcetutan, a ski instructor at the hotel, said he was asleep when the fire erupted and he rushed out of the building.

He told NTV television that he then helped some 20 guests out of the hotel.

He said the hotel was engulfed in smoke, making it difficult for guests to locate the fire escape.

“I cannot reach some of my students. I hope they are OK,” the ski instructor told the station.

Television images showed the roof and top floors of the hotel on fire.

The government appointed six prosecutors to lead an investigation into the fire.

NTV television suggested that the wooden cladding on the exterior of the hotel, in a chalet-style design, may have accelerated the spread of the fire.

The 161-room hotel is on the side of a cliff, hampering efforts to combat the flames, the station also reported.

Kartalkaya is a popular ski resort in the Koroglu mountains, some 185 miles east of Istanbul.

The fire occurred during the school semester break when hotels in the region are packed.

Aydin’s office said 30 fire trucks and 28 ambulances were sent to the site.

Other hotels at the resort were evacuated as a precaution and guests were placed in hotels around Bolu.