later, government spokesman Mohammed al-Momani said that two prisoners, Sajida al-Rishawi and Ziad al-Karbouli, were executed early Wednesday.

Al-Rishawi has been on death row for her role in a triple hotel bombing in the Jordanian capital Amman in 2005 that killed dozens.

The gruesome video came after a week-long drama over a possible prisoner exchange by Jordan to win the release of Lt. Muath al-Kaseasbeh. Jordanian TV reported the killing took place Jan. 3, raising questions about the negotiations for the pilot's freedom.

Jordan agreed last week to release al-Rishawi, an Iraqi woman facing execution for her role in the 2005 hotel bombings in Jordan, but first wanted proof the pilot was alive.

"The Jordanian response to the assassination of the hero pilot, Muath al-Kaseasbeh, will be strong, decisive and swift," governmentmaximum exposure for its actions," IntelCenter said in a statement.

Jordan's King Abdullah II, in Washington on a previously scheduled trip, called for his nation to unite. "It's the duty of all of us to stand united and show the real values of Jordanians in the face of these hardships," he said on Jordanian TV from Washington.

The king went to the White House on Tuesday evening and met with President Obama. He then was cutting short his U.S. visit, the official Petra news agency said.

Obama earlier said the video, if authentic, was more evidence of the group's "viciousness and barbarity" and called the group's ideology "bankrupt."

"And it, I think, will redouble the vigilance and determination on the part of a global coalition to make sure that they are degraded