Jordanian militant Abu Musab al-Zarqawi, al-Qaeda's leader in Iraq, has reportedly been wounded and a website is calling on his followers to pray for him.
A statement from the al-Qaeda Organisation for Holy War in Iraq said: "O nation of Islam... Pray for the healing of our Sheikh Abu Musab al-Zarqawi from an injury he suffered in the path of God.
"You are the beloved of the mujahideen (holy fighters), and may God heal you and make you steadfast .... Our sheikh has taught us that nothing is worthy compared to...Islam."
Posted by the group's media co-ordinator, Abu Maysarah al-Iraqi, it did not say how or when al-Zarqawi was injured. The statement cannot be verified.
Al-Zarqawi's real name is Ahmed Fadhil al-Khalayleh and little is known about him although he is widely reported to have lost a leg - or part of a leg - while fighting in Afghanistan.
His organisation has been blamed for the majority of bomb attacks, kidnappings and assassination attempts in Iraq, including the murder of Briton Kenneth Bigley, 62.
Mr Bigley was beheaded as were his American colleagues Eugene Armstrong and Jack Hensley, who were abducted with him in Baghdad last September by al-Zarqawi's Tawhid and Jihad group.
The United States has put a $25 million bounty on the Jordanian's head - the same amount being offered for the capture of Osama bin Laden.
In Baghdad, US army Lieutenant Colonel Steve Boylan, spokesman for US forces in Iraq said: "We have no information on whether he's wounded or what the state of his health is.
"He's still our number one target to be captured or killed and until that happens, the hunt is still on. This could be another one of their ploys, you never know," he added.