The account of Twitter's CEO and co-founder was hacked for a short while before being secured.
Public tweets and retweets including racial slurs and swear words were sent from Jack Dorsey's account on Friday night.
They appeared in the feed of his 4 million followers before Twitter eventually secured the account.
The tweets and retweets were deleted less than an hour after the breach.
In a statement, Twitter said the phone number connected with Dorsey's account was compromised because of a security oversight by the mobile provider.

Israel carries out rare airborne raid in Lebanon; 16 killed in strikes
US skips congressional review to approve arms sale to Israel
Flash floods in Nairobi kill 23, disrupt flights at major airport
Russia hits Ukraine with drones, missiles, kills at least 10 in Kharkiv
Partial resumption of air navigation in Qatar
