Bangkok: A bus has plunged into a 150-metre deep ravine in northern Thailand, killing 11 people and injuring more than 20, police say.
The bus was carrying 36 Thai passengers from Phrae, 560 kilometres north of Bangkok, to Nan, 670 kilometres north of the Thai capital. The accident took place in Uttaradit province.
"The route is particularly steep and there have been various accidents at this spot," said Colonel Ditsayadej Patcharapuwadol, Uttaradit police chief.
"However, this is the first time the casualties are this big," Ditsayadej added.
An initial investigation found the accident was likely caused by the driver's unfamiliarity with the route.
The driver was being treated at a local hospital and was in police custody.
The death toll could go up as some passengers remain stuck in the bus, although the majority of them were taken to a nearby hospital.
DPA