Aid groups and U.N. agencies say nearly 2.8 million Iraqis are now uprooted within their country.

Iraqi authorities, the Red Cross and U.N. agencies working in Iraq say they have recorded an increase of 300,000 displaced people so far this year, largely due to better methods for registering displacement.

The International Organization for Migration says more than 1 million displaced Iraqis lack adequate food and shelter. A similar number of Iraqis don't have a regular income or employment.

In addition to those displaced within Iraq, more than 2 million Iraqis have fled the country and are living as refugees abroad.