O'FALLON, Mo. -- Armed robbers used the new Pokemon Go smartphone game to target unsuspecting victims in O'Fallon, Missouri, according to police.Four suspects were arrested early Sunday morning in connection with the string of armed robberies, officials stated.Authorities said the suspects were suspected of multiple armed robberies in multiple counties in Missouri.A handgun was recovered, according to police.Detectives said they believed the suspects used the game to, "add a beacon to a pokestop to lure more players" and then used the app to locate victims.Pokemon Go is an "augmented reality" game that allows users to capture, train and battle Pokemon who appear in the real world.Players can pick up supplies at real-world landmarks that serve as "pokestops" in the game.Pokemon GO users have also reported becoming injured while trying to catch the digital monsters