NEW : It just takes some time , and it 's slow , '' Odierno said . Military spokesman characterizes initial reports point to an accident . NEW : Other choppers in the convoy did not sustain damage , spokesman says . Baghdad military : CH-47 Chinook helicopter crashed 100 km ( 62 miles ) west of Basra . Twin car bombs outside Baghdad hospital kill 25 , injure eight .
NEW : Military spokesman characterizes initial reports point to an accident . NEW : Other choppers in the convoy did not sustain damage , spokesman says . Baghdad military : CH-47 Chinook helicopter crashed 100 km ( 62 miles ) west of Basra . Twin car bombs outside Baghdad hospital kill 25 , injure eight .