Beijing: At least six people, including four students were killed and eight others injured when an overloaded van they were travelling in plunged into a 60-metre deep valley in southwest China.
   
The eight-seater van, carrying 12 students and two others, rolled into the valley from a mountainous road in Yunan province on Saturday, the official news agency quoted prefecture officials as saying.
   
Four students, the driver, and an elderly man were killed in the accident.
   
The eight injured, all students, were sent to the prefecture hospital of Wenshan for treatment. Their conditions were not immediately known.
   
Local officials said the students in the area used to take the van to commute from home to the school.
   
Police have launched an investigation into the accident.
   
It is the second traffic accident involving student fatalities in Yunnan this week.
   
On Wednesday, two primary school students died and another 20 were injured after a horse-drawn wagon they were aboard collided with a truck in Yunnan's Qiubei county.
   
The crashes came amid a national debate over the poor condition of school buses in the country and chronic underfunding of public schools.

(Agencies)