"We are aware that @jack (Jack Dorsey's Twitter account. Red's notification) has been compromised and an investigation has been started to find out what has happened," a Twitter spokesperson writes on the company's own account.

Post defended Adolf Hitler

According to Reuters, one of the posts posted to Jack Dorsey's account is to defend Adolf Hitler.

Several posts must also have contained racist insults to African Americans and Jews, and one post claimed that there was a bomb at Twitter's headquarters.

Another post linked to a server on the Discord chat platform where users are reported to have boasted about hacking Jack Dorsey's Twitter account, reports The Guardian. According to Discord, the user has been turned off.

“We are aware of the situation. The server and its owners were permanently shut down from Discord just minutes after we were informed. We will continue to monitor and investigate this incident, ”a Discord spokesman told Reuters.

All posts have been deleted.