Originally posted by the Voice of America. Voice of America content is produced by the Voice of America, a United States federal government-sponsored entity, and is in the public domain. Twitter CEO Account Hacked, Offensive Tweets Posted Agence France-Presse SAN FRANCISCO - Twitter said Friday the account of chief executive Jack Dorsey had been "compromised" after a series of erratic and offensive messages were posted. The tweets containing racial slurs and suggestions about a bomb showed up around 2000 GMT on the @jack account of the founder of the short messaging service before being deleted. 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 messages contained racial epithets, and included a retweet of a message supporting Nazi Germany. "We're aware that @jack was compromised and (are) investigating what happened," a Twitter spokesperson said. Tweets up for 30 minutes The San Francisco-based firm followed up midafternoon with a Twitter post saying Dorsey's account was secured and there was "no indication that Twitter's systems have been compromised." It appeared that tweets posted on Dorsey's account by the hacker were up for about a half-hour before they were removed. Pinned atop Dorsey's account was a tweet from early last year saying: "We're committing Twitter to help increase the collective health, openness, and civility of public conversation, and to hold ourselves publicly accountable towards progress." A barrage of comments fired off on the platform questioned why the Twitter co-founder didn't secure his account with two-factor authentication, and how disturbing a sign it was that the service wasn't to keep its own chief safe on the platform. "If you can't protect Jack, you can't protect ... jack," one Twitter user quipped. .