Kurdistan is also providing refuge for the PKK.
From Reuters today:
Turkey on Thursday welcomed a raid by U.S. and Iraqi forces on a refugee camp of Turkish Kurds in northern Iraq as a first step towards combating Kurdish rebels, but insisted the camp must be shut down.
Iraqi and U.S. troops conducted a search operation on Wednesday at the Makhmur refugee camp in northern Iraq, which Ankara has long argued provides a safe haven for militants from the outlawed Kurdistan Workers Party (PKK).
Looks like the situation is being addressed.