On Thursday evening, United States Border Patrol officials spotted two Canadian teens that accidentally crossed the border from Alberta to Montana while playing Pokemon Go.

The agents quickly determined that the two boys were unaware that they had entered Montana after crossing the U.S. border from Alberta. In a statement, public affairs officer Michael Rappold said:

“Both juveniles were so captivated by their Pokemon GO games that they lost track of where they were.”

The pair were reunited with their mother at a nearby border patrol station in Coutts, Alberta.

The augmented reality game, which overlays images of Pokemon characters over real life objects, has become a worldwide sensation in less than a week.

Pokemon Go is now available in the Canadian App Store as a free download. The game requires any device running iOS 8.0 or later and contains in-app purchases that range between $1.39 and $139.99.

[via The Guardian]