Aid agency Care International has made an appeal on an Arab TV station asking for the release of aid worker Margaret Hassan who was kidnapped on Tuesday.
In the broadcast charity official Denis Caillaux told the kidnappers that Mrs Hassan is an Iraqi citizen and asked them to release her immediately.
Mrs Hassan has lived in Iraq for 30 years and is married to an Iraqi.
On Friday a video of the aid worker was shown begging Tony Blair to withdraw British forces to save her life.