A top adviser to President Obama on Sunday defended the administration for saying in the aftermath of a deadly assault on a U.S. outpost that it was not a pre-planned terrorist attack.

Campaign adviser Robert Gibbs said the answers given Sept. 16 by Susan Rice, U.S. ambassador to the United Nations, were based on "the best information she had" and not intended to mislead the public.

"No one either intentionally or unintentionally misled anyone involved in this," Gibbs said on "Fox News Sunday." "No one wants to get to the bottom of this more than we do."

Rice gave her responses on five Sunday morning TV talks shows, days after at least 20 attacks on U.S. outposts in the Middle East and North Africa, including one on the U.S. Consulate in Benghazi, Libya, in which U.S. Ambassador J. Christopher Stevens and three other Americans were killed.

She said that attack was "spontaneous" and started with an attack on the U.S. Embassy in Cairo, Egypt, over an anti-Islamic film.