The United States issued a rare rebuke of China’s continued efforts to push baseless claims about COVID-19 originating with the U.S. military rather than starting in China.

Officials from both the Trump and Biden administrations have said that the Chinese government worked for over a year to thwart an independent investigation into the origins of the virus, which has killed 2.85 million people worldwide, and both administrations cast doubt on the manner in which a joint WHO-China study released last week was conducted in early 2021. Chinese officials, diplomats, and state-run outlets have repeatedly attempted to shift blame to the U.S. military.