BEIJING— Apple Inc. apologized over the hacking of some Chinese accounts in phishing scams, almost a week after it emerged that stolen Apple IDs had been used to swipe customer funds.

In its English statement Tuesday, Apple said it found “a small number of our users’ accounts” had been accessed through phishing scams. “We are deeply apologetic about the inconvenience caused to our customers by these phishing scams,” Apple said in its Chinese statement.

The incident came to light last week when Chinese mobile-payment giants Alipay and WeChat Pay said some customers had lost money.

The victims of the scams, Apple said Tuesday, hadn’t enabled so-called two-factor authentication—a setting that requires a user to log in with a password and a freshly-generated code to verify their identity.

The Cupertino, Calif.-based company didn’t specify how many users were hit or how much money was stolen, nor did it offer details about how the hackers acquired the users’ Apple IDs and passwords. To help prevent unauthorized access to their accounts, Apple said, people should enable two-factor authentication.