Facebook, WhatsApp, Twitter, Google and Telegram have all said they are "pausing" co-operation with requests for user information from the Hong Kong police.

Several countries have criticised China for imposing a new security law, which they say threatens the territory's long-standing autonomy.

The announcements are likely to put pressure on Apple to do likewise, BBC reported.

While the others' services are blocked in mainland China, Apple's are not.

However, Facebook, Google and Twitter do generate revenue from selling advertising to Chinese clients.