If this story is true, then maybe the Iraqis really aren't ready to take over responsibility yet for their own security.

From the BBC:

A 'wanted' poster for Zarqawi: there is a $25m bounty on his head

Iraqi police captured and mistakenly released militant leader Abu Musab al-Zarqawi last year, the Iraqi deputy interior minister has said.

Maj Gen Hussein Kamal told reporters that Zarqawi was detained in the central Iraqi town of Falluja, but was released when nobody recognised him.

Falluja was the scene of a massive US-led operation in November 2004.

Zarqawi's group, al-Qaeda in Iraq, has claimed responsibility for many of the biggest attacks of the insurgency.

Gen Kamal said Iraqi police had detained Zarqawi for about three or four hours before releasing him.

"Iraqi police forces, who were in Falluja then, did not have sophisticated equipment to take pictures of him or take his fingerprints," he told the Associated Press.