An undated image taken from a video posted on a Web site used by militant groups on March 10, 2007 shows a German passport belonging to Hannelore Marianne Krause, who is being held hostage with her son at an unknown location by an Iraqi Islamist militant group named The Arrows of Righteousness. The little-known militant group said on Saturday it would kill the two hostages in 10 days if Berlin did not withdraw its troops from Afghanistan. German newspapers have said the woman, married to an Iraqi physician, and her son are either Germans living in Iraq permanently or Iraqis with German nationality. In February, German Foreign Minister Frank-Walter Steinmeier told reporters the two had been missing since Feb. 6.