A Hong Kong-based human rights group says protests in two provinces of China have led to clashes with Chinese security forces.
The Information Center for Human Rights and Democracy says a dispute over an investment scheme in southeastern Hunan province triggered two days of riots.
Photographs of the protest posted on Chinese language Web sites show hundreds of people rallying outside a train station in Hunan's Jishou city. The rights group says protesters blocked roads and trains Wednesday and Thursday while demanding government action against a fund-raising company.
China's official Xinhua news agency also reported the incident, but did not mention any violence, injuries or arrests.
The Hong Kong-based group says 20 protesters were detained and 50 injured during the confrontation.
In a separate protest Thursday, a crowd of at least 500 people gathered at a factory in the eastern city of Ningbo demanding the payment of an injured boy's medical bills.
The family of the 14-year-old boy says he ran away from home and was found hiding in the factory by security guards. They say the guards frightened him into jumping out a window.
The Hong Kong-based group also reported on the unrest and says up to 20 people were injured and 10 arrested.
Some information for this report was provided by AFP, AP and Reuters.