Al-Qaeda in Iraq has pledged its support for the terror group's second-in-command leader Ayman al-Zawahri.

The terror network has not yet named al-Zawahri as its overall new leader and it's not clear that he will take over for Osama bin Laden.

Al-Qaeda in Iraq warned President Obama should remain fearful of bin Laden's threats against the U.S., in a statement posted online acknowledging the terrorist leader's death.

"The martyrdom of the sheik will increase the determination and steadfastness among his brotherly mujahideen," the statement said.

"To our brothers in al-Qaeda, first among them sheik Ayman al-Zawahri and his brothers in the leadership of the organization, may God reward you and grant you patience for this loss," it read.

The statement said Obama should be mindful of bin Laden's 19 operatives who attacked the World Trade Center and the Pentagon on Sept. 11, 2001.

"And now the same fear and terror after his death will hurt you as his legacy, and will be a hard burden on you, spoiling your lives and threatening your security and consuming your economy," the statement said. "It is the right of Osama bin Laden's men to fulfill his oath."