The Rapid City Police Department received reports of credit card skimmers placed at both Walmart stores on January 9.
The skimmers, located at checkout lanes, have the potential to capture credit or debit card information.
While there is no evidence of compromised card information, police are urging individuals to monitor their bank statements.
Authorities are seeking information to identify the suspects involved and encourage anyone with relevant details to contact RCPD Detective Nick Strampe.
Additionally, the public is advised to report any suspicious activity or charges on their cards to the issuing company.