The Transportation Security Administration says a laptop containing the sensitive personal information of 33,000 applicants to an airport security prescreening program has gone missing.

Agency officials say the unencrypted computer was discovered missing at San Francisco International Airport more than a week ago, though the agency was not notified until Sunday.

The TSA has suspended new enrollments in the program, known as Clear, which allows passengers to pay to use special "fast lanes" at airport security checkpoints.

The laptop belonged to Verified Identity Pass Inc., which operates the program at 17 airports nationwide.

An agency spokesman says the company must notify all affected applicants and show it has installed encryption on all its computers before it can restart enrollments.