A man who disrupted a flight from Hong Kong to New Jersey was ranting about national security and the CIA, according to a passenger aboard the plane.

Jacques Roizen, of New York, said the man aboard United Airlines Flight 116 on Monday was clearly unstable and "very paranoid." Roizen said he and other passengers and a flight attendant jumped on the man and subdued him when he started reaching for his pockets about six hours from the flight's destination in Newark, N.J.

The FBI had said earlier that the man claimed everyone aboard was being poisoned. but the agency said it is now working to clarify what the man said.

Passenger Peter Jones, of Washington, said he heard the man claim he himself was going to be poisoned.

The FBI said the unruly passenger has been hospitalized.