A U.S. helicopter made a "precautionary landing" Sunday morning in the Shiite suburb in northern Baghdad, a spokesman for the U.S. military command confirmed. No-one was injured, he said. It was unclear whether the helicopter had been shot down by Shiite cleric Moqtada al-Sadr's so-called "Mahdi army". The spokesman termed the incident a "precautionary landing", the causes of which were being investigated.
