NEW : Military spokesman characterizes initial reports point to an accident . Baghdad was also struck by a series of roadside bombings that killed two and wounded 16 , the official said . The U.S. military has released a statement saying that the crash of a helicopter in Afghanistan was caused by mechanical failure and not enemy fire. U.S. military : CH-47 Chinook helicopter crashed 62 miles ( 100 km ) west of Basra . Twin car bombs outside Baghdad hospital kill eight , injure 25 .
NEW : Military spokesman characterizes initial reports point to an accident . The U.S. military has released a statement saying that the crash of a helicopter in Afghanistan was caused by mechanical failure and not enemy fire. U.S. military : CH-47 Chinook helicopter crashed 62 miles ( 100 km ) west of Basra . Twin car bombs outside Baghdad hospital kill eight , injure 25 .