Twitter has suspended the Associated Press account after hackers sent a tweet Tuesday saying, "Breaking: Two Explosions in the White House and Barack Obama is injured."
White House spokesman Jay Carney confirms the president is fine, and AP confirms its account was hacked.
Last week, NPR.org and NPR's Twitter accounts were hacked by a group that calls itself the Syrian Electronic Army.
The same group took responsibility for hacking CBS's website and Twitter accounts over the weekend.
The Dow dropped precipitously following the false news of the explosion. Twitter was integrated into Bloomberg financial terminals earlier this month.