If you have crossed the border into the U.S. or flown into or out of an American airport your photo and licence plate number may have been hacked.
The U.S. Customs and Border Protection service says it has been the victim of a malicious cyberattack.
Tens of thousands of picture of licence plates and photos of travellers at airports were taken from the site of a subcontractor.
So far none of those photos have been found online.
The service is now investigating to figure out where the attack originated from and who carried it out.