Los Angeles law enforcement is severing ties with its COVID-19 testing firm due to its potential connections to Chinese actors.

Los Angeles County Sheriff Alex Villanueva announced Monday his office would no longer use Fulgent, a genetics firm in Los Angeles, for mandatory COVID-19 testing due to allegations that the company was connected to China. The sheriff expressed his concerns in a letter to the Board of Supervisors, stating he had attended a briefing at the FBI’s Los Angeles office, where he was informed of connections between Fulgent and China.