Detroit police have busted a gang that preyed on high-rolling gamblers who won big at local casinos.

On Thursday, local CBS affiliate WDIV reported that three individuals had been arrested in connection with a scheme that involved several robberies and carjackings of victims who’d just left the MGM Grand Detroit and MotorCity casinos.

The incidents occurred last September, and involved one gang member observing activity in high-limit gambling areas, then following high-rollers into the properties’ parking garages to identify their vehicles. The other members of the gang would wait in the parking lot, then follow the VIPs’ vehicles in their own cars.

Once on the highway, the perps would bump their vehicles into the VIPs’ cars, prompting them to pull over to inspect the damage. When the victims emerged from their cars, the perps would pull pistols, then take the victims’ money and phones. Depending on the model, the perps would sometimes drive off in the victims’ cars.