CAIRO, Egypt — Hundreds of suicide bombings in Iraq have "broken the back" of the U.S. military, al-Qaida's No. 2 said in a video posted Saturday — the latest in a series of messages from the terror network.

The video by Ayman al-Zawahri, posted on an Islamic militant Web forum, came within the same week as an audiotape by al-Qaida's top leader Osama bin Laden and a video by the head of al-Qaida's branch in Iraq — the group's most prominent figures.

Al-Zawahri, an Egyptian militant believed to be hiding in Afghanistan or Pakistan, also denounced the leaders of Egypt, Jordan, Saudi Arabia and Iraq as "traitors" and called on Muslims to rise up to "confront them."

He said that U.S. and British forces in Iraq had bogged down in Iraq and "have achieved nothing but loss, disaster and misfortune."

Al-Qaida in Iraq "alone has carried out 800 martyrdom operations (suicide attacks) in three years, besides the sacrifices of the other mujahedeen, and this is what has broken the back of American in Iraq," al-Zawahri said.

U.S. counterterrorism officials were aware of the video and analyzing it, two officials said on condition of anonymity.