Convenience Retail Asia (HKG:0831) experienced a network disruption in Hong Kong on Sept. 20, affecting internal systems and certain functions of its loyalty program, according to a Monday bourse filing.

The company said stores remain open and are accepting payments by cash, Octopus, and other electronic methods.

Third-party forensic experts have been engaged to investigate the cause, scope, and extent of the incident, including whether any data has been compromised.

Convenience Retail Asia has reported the matter to law enforcement and said it will notify Hong Kong's privacy commissioner if a data breach is confirmed.