The co-founder and chief executive of Twitter had his own account on the service briefly taken over by hackers.
Some of the tweets contained the hashtag #ChucklingSquad, which was believed to indicate the identity of the hacker group. The same calling card was left behind during recent hacks of other high-profile social media personalities.
The profile, which has more than four million followers, tweeted out a flurry of highly offensive and racist remarks for about 15 minutes. The messages contained racial epithets, and included a retweet of a message supporting Nazi Germany.
Twitter said that the phone number associated with Dorsey’s account was “compromised due to a security oversight by the mobile provider”, allowing a hacker to posts tweets to @jack by sending text messages.
Twitter said on Friday the account of chief executive Jack Dorsey had been “compromised” after a series of erratic and offensive messages were posted.
It appeared that tweets posted on Dorsey’s account by the hacker were up for about a half-hour before they were removed.