Police arrested a flight school instructor and his assistant after they allegedly kidnapped a student pilot in Redding, Calif., and tried to send him back to China, authorities said.

Two IASCO Flight Training employees — Jonathan McConkey and his assistant, Kelsi Hoser — showed up to the trainee’s apartment Thursday night and told him he was going to be “shipped back” to China the next morning, said Redding police Cpl. Rob Peterson. The trainee, Tianshu Shi, was not told why, Peterson said.

Shi had enrolled in the program through an organization that contracts with the school to train Chinese nationals, Peterson said. The Civil Aviation Authority of China sends up to 180 students to the program, according to the school’s website.

On Friday morning, McConkey and Hoser returned to the trainee’s apartment and told him to pack his bags.

Shi told the Record Searchlight that he didn’t sleep all night and that when the two came back in the morning, he recorded the confrontation. The profanity-filled audio clip was obtained by the Searchlight.

“I’ve got your [expletive] passport; you’re leaving now,” a male voice says in the recording. He later says. “The United States government needs you out of this country right now, you understand?”

“You are here illegal, you know that,” a female voice says later. “If you don’t go with us, you go to jail.”

During the conversation, Peterson said, McConkey shoved Shi into a countertop, knocking him to the floor. Peterson also said the suspects threatened to call the police on Shi, who had come to the country with a student visa. Fearing for his safety, authorities said, Shi got in their car.

At some point, Shi had managed to contact his brother in Shanghai and told him what was going on. When the brother didn’t hear back from Shi a short time later, he spoke to another flight school student who said Shi had been assaulted and kidnapped. Shi’s brother then called Redding police.

Officers found Shi, McConkey and Hoser at the Redding airport.