FBI Director Kash Patel confirmed the arrest of two Chinese nationals in the U.S. He said they allegedly brought a dangerous biological agent into the country. Patel posted on X, “New... I can confirm that the FBI arrested a Chinese national within the United States who allegedly smuggled a dangerous biological pathogen into the country.”
New... I can confirm that the FBI arrested a Chinese national within the United States who allegedly smuggled a dangerous biological pathogen into the country.
— FBI Director Kash Patel (@FBIDirectorKash) June 3, 2025
The individual, Yunqing Jian, is alleged to have smuggled a dangerous fungus called "Fusarium graminearum," which is an…
Fungus Poses Major Threat to Crops and Health
The fungus, Fusarium graminearum, can destroy major crops like wheat, maize, barley, and rice. It also harms humans and animals. The fungus causes head blight, a serious crop disease.
Patel explained, “The individual, Yunqing Jian, is alleged to have smuggled a dangerous fungus called 'Fusarium graminearum,' which is an agroterrorism agent, into the U.S. to research at the University of Michigan, where she works.”
He added, “It is responsible for billions of dollars in economic losses worldwide each year.”
Suspect Worked at University of Michigan
Jian allegedly used the fungus for research in the U.S. Investigators found that she previously received research funds from the Chinese government. Patel revealed that Jian showed loyalty to the Chinese Communist Party.
Second Suspect Admits Smuggling
Jian’s boyfriend, Zunyong Liu, also faces charges. He works at a university in China and studies the same fungus. At first, Liu denied any wrongdoing. But later, he admitted smuggling the fungus through Detroit Metropolitan Airport. According to the FBI, he planned to do research at the University of Michigan, just like Jian. Authorities charged Jian and Liu with conspiracy, smuggling, lying to federal agents, and visa fraud.
FBI Issues Strong Warning
Patel warned that this case shows how the Chinese Communist Party is targeting U.S. research institutions and food security. He said, “Your FBI will continue working tirelessly to be on guard against it. Our @FBIDetroit team did excellent work in this case partnering with @CBP. Justice will be done.”
Case Adds Fuel to U.S.–China Tensions
This incident comes as tensions between China and the U.S. grow. On Monday, China’s commerce ministry pushed back against U.S. claims. President Donald Trump had accused Beijing of violating a tariff agreement made in Geneva. According to Reuters, the ministry called the accusations “groundless” and rejected them as “unreasonable.”
China Responds to U.S. Measures
China criticized the U.S. for taking new actions. These include updated rules on AI chip exports and banning Chinese students from certain visa categories. China also accused the U.S. of imposing discriminatory restrictions on chip-design software.
Trump Promises Tougher Stance
Last week, Trump posted on TruthSocial that he would stop being “Mr. Nice Guy” with China. However, he didn’t say exactly how China violated the agreement. Later, during a briefing at the White House, Trump said he would speak to President Xi Jinping to try to resolve the issue.