A Chinese solar panel company has apologized for a devastating toxic spill at one of its manufacturing plants in August and vowed to clean up the pollution after four days of protests outside its headquarters. According to reports, solid waste contaminated with high levels of fluoride leaked from a plant owned by JinkoSolar Holding Company in Haining, located about 80 miles southwest of Shanghai, and was swept into a nearby river by heavy rains on Aug. 26. Residents say the pollution caused a massive fish-kill in the river, and that pigs whose sties were washed with river water also died. Following a four-day protest that at times became violent, a JinkoSolar spokesman admitted that the incident occurred and vowed “appropriate” steps to clean up the contamination. “We cannot shirk responsibility for the legal consequences which have come from management slips,” the spokesman, Jing Zhaohui, told a news conference. The demonstrations in response to the spill are the latest example of growing public outrage over pollution in China. Last month, thousands of demonstrators forced the closure of a paraxylene plant in northeastern China’s Dalian.