Police in Barcelona are investigating the disappearance of a United Airlines passenger's luggage after it was reported stolen at an airport, despite an AirTag showing it a 'few feet away.'

A police investigation begun to locate the missing luggage of two United Airlines passengers who flew to Barcelona.

An American couple – using a digital age hack to keep track of their luggage as they flew overseas for a European vacation – were left frustrated with United Airlines when one of their bags never made it to them despite them knowing exactly where it was.

Image via Getty Frustrated passengers are putting United Airlines on blast after the airline said their bags were missing. However, they said that their AirTags showed their bags were right there. Both Dan Adams and his partner Kurt were going on a two-month vacation to Europe,

But Adams’ first stop, in Barcelona, was unplanned: the United Airlines baggage office. “One bag came out, second bag came out, third bag came out, and the fourth one didn’t,” Adams recalled. Locating that fourth bag was supposed to be easy.