Facebook has said it will not remove a manipulated video of its chief Mark Zuckerberg from Instagram, in which he appears to credit a secretive organisation for his success.
The clip is a “deepfake”, made by AI software that uses photos of a person to create a video of them in action.
Facebook had previously been criticised for not removing a doctored clip of US House Speaker Nancy Pelosi.
The latest decision coincided with the announcement of 500 new jobs in London.
The social network has said many of the posts will be involved in building machine-learning based software of its own to automatically detect and remove malicious content posted to its platforms.
In addition, they will build tools to help human workers review potentially harmful material.
The company said it would bring its tally to more than 3,000 jobs in the capital by the end of 2019.