(KMOV) -- Several police agencies are now investigating as more shoppers continue to say their credit or debit card numbers have been stolen after shopping at Schnucks stores.
Schnucks says it has hired a forensic firm to figure out exactly where security was breached.
The Maryland Heights Police Department is just one of many departments investigating these cases of identity theft. Right now officers say they have at least 30 cases from residents claiming credit card fraud. Until investigators determine Schnucks is in fact the source of this, they're telling customers to keep a close eye on their account.
Detective Sgt. Richard White says, “they're working diligently on their end with local police agencies to determine even if they are the point of compromise."
Detective Sgt. White says they continue to take calls from potential victims; many of them who say their credit or debit card numbers were stolen after a trip to the grocery store.
"If the breach is with them they've hired a private firm…an investigative firm to determine that if in fact it's on their end,” says White. He continues to say, “our fraud investigator is tenacious and he’s going to take it as far as he can and as long as he can until he resolves it or gets the result.”
In the meantime, some customers are doing their shopping elsewhere, afraid of going back into Schnucks until more information is released.
"My concern is someone is going to get my credit card information. I mean, if I had to go I'd pay cash to tell you the truth," customer Lauren Murphy said.
News 4 contacted officials with MasterCard, whose headquarters is in O’ Fallon, Missouri. They say they're aware of the breach and any cardholder affected by this will not be held responsible for those charges.