Hackers accessed the social media account of Twitter CEO Jack Dorsey and used his profile on the platform to tweet offensive and racist slurs to his 4.2 million followers.
A group called the Chuckling Squad is believed to be behind the hack.
Twitter confirmed that Mr Dorsey’s account had been breached on Friday for approximately 15 minutes.
We're aware that @jack was compromised and investigating what happened.
— Twitter Comms (@TwitterComms) August 30, 2019
The social media site was not breached elsewhere by the hackers who had targeted Mr Dorsey.
Post tweeted from the CEO’s Twitter account included anti-Semitic comments. All comments by the hackers have been deleted.
How the attackers gained access into his account remains unclear, though reports suggest a third-party app could be partly to blame.
The Twitter co-founder’s account hacked before. In 2016, the security firm OurMine hacked Mr Dorsey’s Twitter to send out a message about “testing your security.”
It comes after Twitter promised to improve the "health" of discourse on the social network by cracking down on hate speech and abuse.