Cybersecurity firm links Piers Morgan Twitter hack to leak of 400m records

The former Australian prime minister Scott Morrison appears to have been caught up in a leak of partial data on 400 million Twitter users, along with celebrities including the model Cara Delevingne, US politician Alexandria Ocasio-Cortez and pop singer Shawn Mendes.

The Guardian has decided not to name the site.

That came after someone attempted to sell the email addresses and phone numbers of 5.4 million users. Twitter said it would alert users confirmed to have been affected by the breach.

Those details were released in November, with reports at the time it could be the tip of the iceberg and no one able to confirm for sure how many users had been caught up by people exploiting the flaw.

So far, no one has independently verified that the poster has access to what they claim.