Multiple banks are reporting fraudulent activity on cards used at hotels owned by real estate magnate, reality TV star, and now controversial presidential candidate Donald Trump.

The information was first reported by cybersecurity blog Krebs on Security late yesterday. Krebs posited that the hotel chain is the victim of a card data breach that dates back to February. It appears to involve Trump Hotel Collection locations in Chicago, Honolulu, Las Vegas, Los Angeles, Miami, and New York. Krebs on Security is a blog run by former Washington Post cybersecurity reporter Brian Krebs.

Eric Trump, Donald's son and executive vice president of development and acquisitions for the Trump Organization, acknowledged suspicious card activity experienced by Trump hotel guests but did not confirm the breach.

"Like virtually every other company these days, we have been alerted to potential suspicious credit card activity and are in the midst of a thorough investigation to determine whether it involves any of our properties," the younger Trump said in a statement. "We are committed to safeguarding all guests' personal information and will continue to do so vigilantly."