The FBI said Wanying Zhang, also known as Heather, was arrested at Los Angeles International Airport on Sunday before her planned departure to China.

U.S. authorities arrested a California woman on Sunday and accused her of spying on a son of Taiwan’s president at the behest of Chinese officials, the FBI said.

The FBI arrested Wanying Zhang, also known as Heather, at Los Angeles International Airport on Sunday before her planned departure to China, the agency said in a statement. Authorities charged Zhang, 34, of Irvine, California, with acting as an unregistered foreign agent.

Zhang surveilled a son of Taiwanese President Lai Ching-te, the FBI said. The agency did not directly name Zhang’s alleged target, but later shared a New York Post report identifying him as Lai Ting-yu, a U.S. resident.