Ropes & Gray will lead an internal investigation at British pharmaceutical giant GlaxoSmithKline Plc. (GSK), following Chinese government allegations that the company’s China operations paid almost $500 million in bribes to help boost sales.

GSK has admitted that some of Chinese employees may have broken Chinese laws. China's Ministry of Public Security has said it believes GSK paid bribes to doctors and other officials to get them to use its products over those of competitors. Chinese police have detained four Chinese executives from GSK, including the company’s China legal affairs director Zhao Hongyan.