In a bus accident in a Chinese mine, at least twenty people were killed on Saturday and 30 people were injured. That reports the Chinese news agency Xinhua .

The mine is located in the autonomous Inner Mongolian region in China, near the border with Mongolia.

The brakes of the bus stopped working, causing the vehicle to hit a wall at full speed. A spokesman for the region said that the bus had been crushed.

A special team conducts research into the circumstances of the accident