Reuters reports that that the hackers posted fake stories about Syrian rebels, followed by a tweet stating, "Just kidding. The Syrian Electronic Army was here," along with a tweet linking to a newspaper article with the headline, "In battle against hackers like the Syrian Electronic Army, Twitter introduces extra security measures."
According to E Hacking News, the fake tweets posted to @itvlondon included the following: "Francois Hollande to double aid to rebels, including a complementary French flag with every aid package," "Cameron cuts education funding, triples aid to Syrian rebels," and "Scotland Yard: Cleaver used in #Woolwich murder case linked to aid sent by MI6 to Syrian rebels on Hague's orders."
An ITV spokesman told Reuters, "The ITV News London Twitter account was compromised for a short time but has now been secured and the Tweets have been deleted." The spokesman said the breach was the resulting of a phishing attack, and that he didn't know whether or not the affected Twitter account had two-factor authentication enabled.