A stream of racist and anti-Semitic tweets were posted from the account of Twitter CEO, Jack Dorsey, after it was reportedly hacked on Friday, allegedly by a group called ‘Chuckle Squad’. Confirming the security breach, Twitter said that the company has initiated an investigation into the issue, and assured that the account is now secure and back under Dorsey’s control. All 17 tweets and 6 re-tweets made by the hackers have since been deleted.

We’re aware that @jack was compromised and investigating what happened.

The phone number associated with the account was compromised due to a security oversight by the mobile provider. This allowed an unauthorized person to compose and send tweets via text message from the phone number. That issue is now resolved.