NEW : Officials say it 's the worst passenger plane crash on Pakistani soil . Search ends for bodies in Americans crash . Officials do not know if weather played a factor in the crash Wednesday . half of the people on board the flight were Pakistani , Institute of Medical Sciences Hospital in Islamabad says .
NEW : Officials say it 's the worst passenger plane crash on Pakistani soil . Search ends for bodies in Americans crash . half of the people on board the flight were Pakistani , Institute of Medical Sciences Hospital in Islamabad says .