The British-based relief group Oxfam has become the latest international agency to pull workers out of Iraq due to fears for their safety.
Oxfam's non-Iraqi staffers left for Jordan on Monday. Some Iraqi staffers remain, but the agency says its work on restoring Iraq's water and sanitation services has been severely hampered by a lack of security.
The pullout follows the bombing of the United Nations' headquarters in Baghdad last week, which killed 23 people.
Oxfam spokesmen say the group is responding to the general security situation in Iraq, rather than one specific event.
Other international relief agencies have also withdrawn at least some of their foreign workers, including the British-based group Save the Children and the International Committee of the Red Cross.
On Tuesday, the U.N. Security Council approved a resolution calling violence against humanitarian aid workers a war crime.