The Washington Post reports that "hackers claiming allegiance to the Islamic State took control of the social media accounts of the U.S. military’s Central Command on Monday, posting threatening messages and propaganda videos, along with some military documents."
"The command’s Twitter and YouTube accounts were eventually taken offline, but not before a string of tweets and the release of military documents, some of which listed contact information for senior military personnel. A Centcom spokesman confirmed their accounts were 'compromised,' and said later that the accounts have been taken offline while the incident is investigated more."
“'CENTCOM’s operation military networks were not compromised and there was no operational impact to U.S. Central Command,' a military statement said. 'CENTCOM will restore service to its Twitter and YouTube accounts as quickly as possible. We are viewing this purely as a case of cybervandalism.'”