China: Bomb suspect was avenging personal grudge

China's state news agency says a 22-year-old man has been charged with setting off a homemade bomb in central Beijing that left an American student injured.

Xinhua News Agency said Wednesday that Lei Sen allegedly made a bomb using firecrackers, wires and a battery, then set it off last October using a cell phone. The report said the motive was "to avenge a personal grudge against society," but did not elaborate.

An American who was studying in China and passing by at the time received minor leg injuries.

Lei faces a charge of endangering public security and if convicted could be sentenced to 10 years in prison. A court date has not been set.