The message appeared on May 15, and a photo of the receipt circulated on X (formerly Twitter) on May 16, according to The Star.
Penang police chief Comm Datuk Hamzah Ahmad said three of the foreigners will remain in custody until June 3, while the 67-year-old man has been released on police bail. All four were arrested on May 16.
The case is being investigated. The offending words were included in the remarks section of an order received through the Domino’s app.
"We do not tolerate discrimination or aggression of any kind, whether directed at our team, our customers or those in our community," The South China Morning Post quoted Domino as saying in a statement last Thursday.
Domino’s added that appropriate measures have been taken against both the customer and the staff member involved."We are deeply disappointed that a customer made a hurtful and disrespectful comment when placing their order."
"We are also disappointed that one of our team members thought it was appropriate to share this online, including the customer’s personal information," it said.