The ethnic groups who live in northern Iraq have been squabbling over the city of Kirkuk for years.
But the dispute - between the Kurds and Arabs - has deepened in recent months.
The Kurds have their own army, known as the Peshmerga. And its presence has raised tensions in the region.
Here's Rawya Rageh, with the first part of a series of special reports.
Source: Al Jazeera