Authorities said Monday that an unencrypted laptop that went missing from a locked office at SFO last month then reappeared more than a week later was stolen, not misplaced.

The computer contained the personal information of some 33,000 people who had applied to the Clear registered travel program, which is run by Verified Identity Pass Inc.

The laptop was reported stolen July 26 but was found on the morning of July 29 in a cabinet in the same locked office at the airport from which it went missing, said Allison Beer, a spokeswoman for the company.

No one has been detained or arrested in connection with the case, but the investigation remains “highly” active, San Mateo County sheriff’s Sgt. Wes Matsuura said.

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A preliminary investigation indicated that no information on the laptop was compromised.

Information on the laptop included applicants’ names, addresses, birth dates and some driver’s license numbers and passport information, the company said.

Beer said Monday that all computers had been encrypted as of late last week.