The U.S. House Select Committee on China has opened investigations into five pharmaceutical companies regarding their clinical trials in China, questioning whether the drugmakers may have aided the country’s military biotechnology research.Representatives from AbbVie, Bristol Myers Squibb, Eli Lilly & Co., Merck and Pfizer have until July 17 to answer letters sent to each by committee

House China panel probes Bristol Myers, Pfizer over clinical trial sites tied to the Chinese military and Xinjiang amid scrutiny of pharma's China ties.

US lawmakers probe Merck and AbbVie over national security and ethical risks tied to clinical trials conducted in China.