Jamestown Foundation's Terrorism Focus, 10 Jul 07:

Firefight in Iraq Exposes Presence of Turkish Al-Qaeda Operatives
The northward moves by Kurdish rebels into Turkey in recent weeks and their bombings of Turkish military and civilian targets have been reported extensively, as have the consequent threats by the Turkish military to move into Iraq to bring about a halt to the Kurdistan Workers' Party (PKK) attacks. A firefight with U.S. forces in Iraq on June 23, however, has shed light on the hitherto lesser known southward flow of foreign fighters out of Turkey into Iraq and the role of Turkish al-Qaeda in overseeing that movement....