Tech billionaire Elon Musk has revealed he has bought Twitter "to help humanity".
The 51-year-old mogul has hit back at critics who believe he has only purchased the social-networking company for advertising.
In a statement uploaded to Twitter aimed at the platform's advertisers, Mr Musk said he was acquiring the platform because he believed it was important to have a space where "a wide range of beliefs can be debated in a healthy manner".