(Marshalltown, IA) -- Three people are arrested as a result of a credit card fraud investgation in Marshalltown. Police say over 30 victims are involved in the case. According to a Facebook post, 38 year-old Alieksi Hernandez, 30 year-old Yohannis Bague and 26 year-old Oscar Alcaraz--all from out of state--are accused of placing a credit card skimming device at a Casey's gas pump in Marshalltown. Victims say they also used their card at Walmart and a Git-n-Go in town.