The new augmented reality game Pokemon Go has gotten people off the couch and into the real world. But police in O’Fallon, Missouri say that four men have used the game to find players at a specific location, and robbed them using a handgun.

Armed robbers have used Pokemon Go to find nine victims this weekend https://t.co/aiFbbXWupF pic.twitter.com/nGM5LKQNYC

— Gizmodo (@Gizmodo) July 10, 2016

About eight or nine people have been robbed by four men over the past couple of days, a spokesperson from the O’Fallon Police Department told Gizmodo over the phone. The latest robbery occurred Sunday morning at around 2am by the men in a black BMW before they were finally apprehended by police.

The suspects used the Pokemon Go game to find their victims by anticipating where people might go through popular PokeStops—virtual sites in the game that can be designated at any real word location, from businesses to parking lots to churches.

Update, 6:19pm: The St. Charles County Prosecuting Attorney’s Office has announced that it’s charging three people with Robbery in the 1^st Degree and Armed Criminal Action; a Class A Felony and an Unclassified Felony.

The three people are all being referred to as adults, depsite the fact that one is 17. The three are Shane Michael Backer, 18, Brett William Miller, 17, and Jamine James D. Warner, 18.