Dow Jones Dives After Fake Obama Attack Tweet
Hackers temporarily upset the US financial markets after falsely reporting President Barack Obama had been injured in two blasts at the White House.
A brief alert on the Associated Press news agency's @AP Twitter account read: "Breaking: Two explosions in the White House and Barack Obama is injured."
Almost immediately the wire service posted via its corporate communications feed that its @AP Twitter account had been hacked, before promptly suspending the service.
"Advisory: @AP Twitter account has been hacked. Tweet about an attack at the White House is false. We will advise more as soon as possible," @AP_CorpComm posted.
White House spokesman Jay Carney later told reporters the president was unharmed.
"I can say that the president is fine," Mr Carney said shortly after the fake tweet. "I was just with him."
Stock markets plunged just as the report came out, with the Dow Jones Industrial Average losing 130 points, or 0.9%, and the S&P 500 dropping 12 points, or 0.8%.
But just as quickly they rebounded to where they were before the tweet, all within four minutes.
The FBI later said it was investigating how hackers were able to send out the bogus tweet on the Associated Press's Twitter feed.
FBI spokeswoman Jenny Shearer confirmed an investigation, but she did not provide further details.
Hackers regularly target the Twitter accounts of news organisations, with online activists backing the regime of Syrian President Bashar al Assad claiming responsibility for hacking an AFP Twitter account in February.
The so-called Syrian Electronic Army, which said it had hacked the AFP account, had earlier claimed credit for hacking the websites of Sky News Arabia and Al-Jazeera Mobile.
On Saturday, social media accounts connected to the CBS News programmes 60 Minutes and 48 Hours were also targeted.
A tweet on the @60Minutes Twitter account stated: "Exclusive: Terror is striking the #USA and #Obama is shamelessly in bed with Al-Qaeda."
The post was later deleted while CBS News stated: "We have experienced problems on Twitter accounts of @60Minutes & @48Hours; We apologise for the inconvenience; Twitter is resolving issues."
On Monday, the Syrian Electronic Army hacked the websites of Fifa and Fifa president Sepp Blatter.