Earlier in the day tweets coming from the 60 Minutes account seemed farfetched, including one that claimed the US government was "hiding the real culprit of the Boston bombing."Other Tweets contained links to virus-laden sites, and rants about government conspiracies and treatment of Syria. The Syrian Electronic Army claimed credit; previously they have claimed credit for the hacking of Twitter accounts at the BBC, NPR, Reuters, several radio & TV stations, and the NGO Human Rights Watch.
Sources - CBS Twitter Feeds Are Compromised, TVNewsCheck
Syrian Electronic Army claims credit for CBS Twitter accounts hack, SlashGear.com