(NewsNation) — One of the leading frontier artificial intelligence labs recently uncovered a recording device surreptitiously placed in one of its offices. San Francisco-based OpenAI revealed the find in a social media post Tuesday.

“We discovered a sophisticated recording device that was hidden inside one of our offices,” wrote OpenAI in a post. The AI company, which is based in San Francisco, said it used its models to understand the device and where it had come from.

The employee, identified as a 35-year-old Saudi national named Abdulrahman Alfozan, was arrested Friday, a week after the ChatGPT maker discovered an audio recording device hidden in the conference room, according to a criminal complaint filed in federal court in San Francisco.

The complaint did not identify the company, but the company confirmed in a separate statement that it had discovered a “sophisticated recording device that was hidden inside one of our offices,” reported the finding to the FBI and fired the employee.

“We used our models to understand the device and where it had come from, identifying that a specific employee had planted it a few days earlier. We referred the matter to the FBI, and we’re grateful to the agents and prosecutors who moved quickly to make an arrest. The FBI’s investigation is ongoing and we will continue to support their work,” an OpenAI spokesperson said.

“At this time, we have no indications of this individual inappropriately accessing or exfiltrating model weights, source code, or customer data. The employee was terminated,” the statement said.

The complaint does not detail what Alfozan might have wanted to do with any captured communications.

Alfozan made his first court appearance Tuesday on a charge of using or endeavoring to use an electronic, mechanical, or other device to intercept oral communications. It was not immediately clear if he had a lawyer who could speak on his behalf.

The recording device was found Sept. 30 concealed in toilet paper and inserted into a USB port on the back of a television in the conference room, according to the complaint.

Though the conference room where the recording device was found did not have a camera at the time it was installed, closed-circuit television footage inside the company’s offices revealed that Alfozan was near the conference room on multiple occasions last month despite not having any authority to access the space, the complaint says.

The Associated Press and NewsNation affiliate KRON in San Francisco contributed to this report.