A Web site carried a videotape on Tuesday that purported to show the beheading by a militant group in Iraq of a man identified as an "Egyptian spy" working for US forces.
The tape, purportedly made by the Tawhid and Jihad Group of al Qaeda ally Abu Musab al-Zarqawi, showed the Egyptian giving his name as Mohammed Mutawalli and saying he had helped US forces pick targets for their attacks on insurgents.
"I worked as a spy for the Americans in Iraq...and I used to take women to the Americans at the airport to do with them as they wished."
"Planes would come and attack targets I had marked...," said the man, adding that he came from Dakahliya in north Egypt.
Masked men were then seen to push him to the ground and decapitate him with a knife. His severed head was later held up for the camera.
The video also carried scenes of US air attacks on the rebellious city of Falluja.