Chinese police have arrested a 50-year-old man suspected of raping six school girls in north China's Hebei province.
The suspect allegedly forced the victims at a knife point.
He either tailed a girl who was walking alone or lied that he was just offering a ride, police said.
A school girl was raped in September in Hebei and police investigation led to the suspect, surnamed Duan, and linked him with other five rapes in Beijing and Hebei since 2009.
The case is still under investigation, the police said.
