[JURIST] Iraqi Prime Minister Iyad Allawi is "very concerned" by a fatal shooting of an apparently unarmed and wounded Iraqi man in a Fallujah mosque by a US soldier, Allawi's office said Wednesday. US Ambassador to Iraq John Negroponte expressed regret over the shooting Wednesday and said the US was investigating the incident. Negroponte said the incident would not undermine US operations to retake Fallujah, despite anger among residents after the video was aired by Aljazeera, the Arab television news station. US military officials said an investigation was looking into whether more than one shooting occurred at the mosque. JURIST's Paper Chase has background on the shooting. AP has more.