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FBI arrests 3rd Chinese national in US for smuggling biological materials
In a post on X, Patel confirmed that Chengxuan Han, a PhD student from Wuhan, China, was detained by agents from the FBI Detroit at Detroit Metropolitan Airport on June 8. Han stands accused of sending four packages containing biological materials related to roundworms to individuals affiliated with a laboratory at the University of Michigan.
Han allegedly made false statements to federal officers about the packages and had erased her electronic device shortly before arriving in the US. In a subsequent interview with agents from the FBI and Immigration and Customs Enforcement's Homeland Security Investigations (ICE HSI), she admitted to both sending the shipments and lying about their contents.
'She is the third PRC-connected individual charged on similar allegations in recent days,' Patel said, framing the arrest as part of a broader national security crackdown on covert biological research linked to the Chinese Communist Party (CCP). 'The CCP is working relentlessly to undermine America's research institutions,' he said.
Prior FBI arrests and agroterrorism concerns
This arrest follows the recent detention of two other Chinese nationals, Yunqing Jian, a Chinese researcher formerly employed at the University of Michigan, and her partner Zunyong Liu, a researcher at a Chinese institution. The pair has been charged with smuggling a dangerous agricultural pathogen, Fusarium graminearum, into the US without authorisation.
Investigators allege that Jian brought the fungus into the country covertly, continued her research in violation of US biosecurity protocols, and had previously received funding from the Chinese government. Liu is accused of helping smuggle the pathogen through Detroit airport and initially denying involvement before ultimately admitting to the charges.
The University of Michigan has stated that it had no knowledge of the unauthorised shipments and is cooperating fully with federal authorities in their ongoing investigations.
Is the 'smuggled' fungus dangerous?
The fungus, which causes Fusarium head blight, poses a significant threat to cereal crops and can produce toxins harmful to humans and livestock. While federal prosecutors have labelled the case as an example of 'agroterrorism', some experts argue that the fungus is already present in the US and is manageable through existing agricultural practices.
US crackdown on Chinese student visa
The series of arrests comes amid heightened scrutiny of Chinese nationals engaged in research within the US, particularly in sensitive sectors such as biotechnology, artificial intelligence, and aerospace. The US government has announced stricter visa regulations for students and researchers from China and Hong Kong.
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