The US-led military coalition in Iraq has vowed not to make any more concessions to kidnappers after the Philippines withdrew its troops to release a hostage.
In an effort to present a united front against a wave of kidnappings, the United States said it was hoping to send a message to hostage-takers they would not win their demands.
"We understand that conceding to terrorists will only endanger all members of the multinational force, as well as other countries who are contributing to Iraqi reconstruction and humanitarian assistance," the statement said.
The United States has faced an erosion in its coalition composition this year and insurgents have targeted their citizens with kidnappings and beheadings.
Yesterday, a released captive said Iraqi gunmen had freed four Jordanian hostages, and Al Jazeera television said two Turkish drivers had been released because their firm agreed to stop working in Iraq.
Kidnappers won the Philippines withdrawal of its roughly 50 troops last month and have forced some foreign companies out.
Italy has been threatened by a military group claiming links to al-Qaeda that has demanded Rome withdraw troops from Iraq by August 15th or face attacks. Italy has around 2,700 troops in Iraq.