It is supposed that the bus had a problem with its brakes as it was an old one. Another hypothesis is that the driver might have been asleep. After making an impact, the bus spun around and slipped off the shoulder of the road. The top deck of the bus was crushed on one side. The driver fled the scene. A second bus transporting boys students followed on the road but escaped from the accident. Police are searching for the bus driver to clarify what happened.
Thailand's roads are among the most dangerous in the world. In December, 29 people died after a bus travelling through the northern province of Phetchabun plunged off Khun Pha Muang bridge. Last year, road accidents left 8,600 people dead in Thailand.
