Hamzah told reporters at the state contingent police headquarters in Penang Road on Thursday that three of the suspects have been remanded until June 3, while the 67-year-old man is out on police bail.
Statements have also been recorded from several other witnesses, he added.
Last week, police initiated investigations into a derogatory message mocking Islam that was printed on a pizzeria receipt.
Superintendent Kamarul Rizal Jenal said the incident allegedly occurred at Kenari Avenue around 3.05pm on May 15.
He said investigations revealed that an order was received through the Domino’s app and included insulting words in the remarks section of the order.
A photo of the receipt was then circulated on X (formerly Twitter) on May 16.
“We do not tolerate discrimination or aggression of any kind, whether directed at our team, our customers or those in our community,” Domino’s said 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.
The case is being investigated under Section 298 of the Penal Code and Section 14 of the Minor Offences Act for hurting religious feelings and using insulting or abusive words with intent to provoke a breach of peace.