CAIRO, Egypt (AP) — An al-Qaida commander who escaped from a U.S. prison in Afghanistan has posted a Web video urging Muslims to kill the Saudi king for leading an interfaith conference.

Abu Yahia al-Libi, who escaped from Bagram prison in 2005, said "bringing religions together ... means renouncing Islam."

Saudi King Abdullah sponsored this month's dialogue in Madrid among Jews, Muslims, Christians, Hindus and Buddhists, and encouraged all faiths to turn away from extremism.

But al-Libi said "equating Islam with other religions is a betrayal of Islam." He called for "the speedy killing of this tyrant."

The 43-minute video was posted late Monday on an Internet site often used by militants. Its authenticity could not be independently verified.

Al-Qaida leader Osama bin Laden has frequently lashed out at the royal family of his native Saudi Arabia, a U.S. ally.