(Updates with new details) BAGHDAD, Feb 11 (Reuters) - A U.S. Apache helicopter went down north of Baghdad on Sunday, local residents said, but the U.S. military said it was not aware of any such incident. Residents reported seeing a missile hit the attack helicopter, which carries two crew, bringing it down in the Timayma area, near Taji, site of a major U.S. air base 20 km (12 miles) north of Baghdad. U.S. military spokeswoman Lieutenant-Colonel Josslyn Aberle said she had no information on a helicopter crashing in the area. If confirmed it would be the seventh U.S. helicopter to have come down in Iraq in the last three weeks. The U.S. military has confirmed that at least four of those were shot down after being struck by ground fire and says it has adjusted its tactics accordingly.
