A speech posted on the Web Friday by the purported leader of an al-Qaida-linked militant group offered US troops a one-month truce for withdrawing from Iraq without being attacked.
The leader of Islamic State of Iraq, Abu Omar al-Baghdadi, also called on former officers in Saddam Hussein's disbanded army to join his militia, promising to provide them with a salary and house so long as they could recite three "suras," or groups of verses, of the Koran.
The authenticity of the 20-minute audiotape could not be verified but it appeared on an Islamic Web site known for displaying militant groups' statements.
The "Islamic State of Iraq" declared itself in October. It is believed to be an umbrella group for militant organizations, including al-Qaida in Iraq.