At least 28 people were killed Monday after two coaches collided and plunged off a cliff in Zheng'an County in southwestern China's Guizhou Province.

Another four people were injured, Xinhua News Agency said. The accident happened at about 12:30 pm when a coach hit the rear of another coach.

The two coaches, which were heading for Zheng'an County from Zhongguan Township, plunged off a 160-meter cliff after rolling over down a 25-meter slope.

The cause of the accident was under investigation.

(Shenzhen Daily April 6, 2004)