Hackers compromised the Associated Press's Twitter account Tuesday, news sources reported, falsely reporting an attack on the White House.
The Tweet, which claimed two explosions had occurred in the White House and that Barack Obama had been injured, caused the Dow Jones industrial average to drop about 1 percent before bouncing back, NPR reported.
White House spokesman Jay Carney said the president was unharmed, the AP reported. All of the news organization's official Twitter accounts have been suspended in light of the incident.
Both the FBI and the Securities and Exchange Commission are investigating the hacking, Reuters reported.