The bus mainly carried families on their way to the northwest city of Bursa, where they planned to spend a holiday at the Uludag ski resort.
Eleven people have been killed and at least 44 others injured when an intercity bus crashed in Eskisehir, a province in northwestern Turkey.
The driver lost control of the vehicle and crashed against trees along the roadside.
Officials said 46 people were injured in the crash, which happened in the Eskisehir area in the north-west of the country.
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Eskisehir Governor Ozdemir Cakacak and Provincial Police Chief Engin Dinckaza examined the scene.
It was not immediately clear if any children were among the victims. The two drivers, who were slightly injured, have been arrested, and an investigation has been launched.
Traffic accidents are common in Turkey, with over a million reported incidents in 2016.