Silicon Valley resident Yasir Afifi recently discovered an FBI tracking device on his car when he took it for an oil change.

Alarmed and curious about what it might be, Yasir posted photos of the device online, asking members of reddit whether it was a bomb, or possibly an FBI tracking device.

In a short amount of time Yasir learned that it was in fact a GPS tracking device, and it was made by a company that only sells to government agencies.

Days later he was able to learn the direct source of the tracking device, when he was visited by a large group of FBI agents who had seen his posts online, and wanted their device back.