FACTBOX - Major al Qaeda leaders killed or captured

(Reuters) - Iraqi and U.S. forces have detained a man suspected of being the leader of al Qaeda in Iraq, Iraqi security officials said on Friday.

A Defence Ministry spokesman said a regional security chief had told him the al Qaeda leader, an Egyptian called Abu Ayyab al-Masri but also known as Abu Hamza al-Muhajir, had been detained.

"American forces have taken him to identify him," he said. The U.S. military said it had no immediate information.

Below is a list of major al Qaeda figures killed or captured since 2001:

AFGHANISTAN:

* Mohammed Atef, one of the top leaders of Osama bin Laden's al Qaeda network, was killed in a U.S. air strike in Afghanistan in November 2001.

ALGERIA:

* Hareg Zoheir, the deputy chief of al Qaeda's North Africa wing, was killed along with two other rebels in a gun battle with Algerian troops in October 2007.

IRAQ: