Iraq in the Middle East has been in the headlines for many years due to violence there.
But in the last month there has been fresh fighting within the country, between the government and those who oppose it.
Continue reading the main story
Shia and Sunni
Although most Iraqis are Muslim, they belong to different branches of the faith: Shia and Sunni, who disagree about how the country should be run.
The government in Iraq is Shia while the Isis militants are Sunni.
While most people in Iraq are Shia, about 90% of the world's Muslims are Sunni.
In recent weeks an Islamist extremist group called Isis, which has links to terrorist group Al-Qaeda, has taken control of several cities in the north of the country.
Hundreds of thousands of people have left the area to avoid the fighting, which is getting closer and closer to the capital city, Baghdad.
It's believed almost a million Iraqis have fled their homes since January.