Washington (AP) - President Barack Obama declared Friday that authorities had uncovered a "credible terrorist threat" against the
The disclosures triggered a worldwide alert amid fears that al-Qaida was attempting to carry out fresh terror attacks.
The events "underscore the necessity of remaining vigilant against terrorism," the president said. The packages both originated in
The events unfolded four days before national elections in which discussion of terrorism has played almost no role.
Obama stepped to the podium in the hours after officials disclosed that authorities in
That second package was aboard a plane in
Obama did not identify any institution that had been targeted.
Several other cargo planes at airports along the Eastern Seaboard of the
An FBI spokesman in Chicago, Ross Rice, said both suspicious packages had been sent from the same address in
The president refrained from assigning blame to
The officials spoke on condition of anonymity, citing the ongoing investigation.
White House counterterrorism adviser John Brennan later told reporters that the explosives "were in a form that was designed to try to carry out some type of attack," but he provided no further details.
"The forensic analysis is under way," he said, adding, "Clearly from the initial observation, the initial analysis that was done, the materials that were found in the device that was uncovered was intended to do harm."