Hundreds of villagers for a fourth day protest against the toxic waste from a factory of solar panels in Haining in eastern China.
Some protesters ransack the offices and overturned cars of the province of Zhejiang.
The protest was started on Thursday when 500 villagers near Hongxiao went to the factory to demand an explanation of the death of a large amount of fish in the adjacent river, according to official agency New China .
The villagers also claim that toxic releases from the plant caused at least 31 cases of cancer among residents, including six cases of leukemia, according to Agence France Presse.
Hongxiao a resident of 64 years told the Associated Press that the plant, located near a school and a daycare center, discharges its waste into the river and its dozen chimneys spitting out thick smoke.
"The villagers claim that the plant is strongly moved to another area. I am very concerned about the health of younger generations, "he said.
According to Chen Hongming, Deputy Head of the Office of Environmental Affairs Haining, quoted by China's new industrial releases of this plant do not meet the standards in effect since April. Despite warnings from the authorities, the company has never complied, he said.
The plant is owned by a subsidiary of Jinko Solar Holding Co, which is listed on the New York Stock Exchange (NYSE). The company would not comment.
For its part, the Government of Haining asked the company to suspend production and ensured that a meeting would be held between local leaders and representatives of the villagers.
In China, industrial pollution has become a major problem. The authorities are struggling to contain the anger of the people affected.
Last month, after strong protests, the authorities of the city of Dalian in the northeast of the country, have agreed to move a chemical plant.