Authorities in Denmark say a Danish businessman may have been abducted while traveling in Iraq.
Danish officials say they have not been contacted by any Iraqis or Iraqi groups about the disappearance of the businessman.
Meanwhile, a senior Iraqi Sunni cleric says a Chinese national kidnapped several days ago has been freed.
Muthanna Harith, who is a member of the Iraq's Islamic Clerics Committee, told reporters the man has been handed over to the Chinese embassy in Baghdad. He did not provide details.
Earlier, seven Chinese nationals were released shortly after being taken hostage.
Three Japanese hostages freed on Thursday arrived in Dubai in the United Arab Emirates where they underwent medical checks. Later they are expected to meet with family members and Japanese government officials.
Dozens of other foreigners are still being held captive and one Italian hostage has been killed by his abductors.
U.S. General Mark Kimmitt said Friday, there appears to be at least some loose coordination among the hostage-taking groups.