NEW : Airline : `` We 're not speculating '' on what caused the hole . The airline is also investigating , Wunder said . A pilot discovered a small hole in the exterior of the aircraft . An FBI spokeswoman says the hole is bullet-sized , but not necessarily from a gun . The plane was carrying about 100 passengers and crew members when it went down at around 12:30
NEW : Airline : `` We 're not speculating '' on what caused the hole . A pilot discovered a small hole in the exterior of the aircraft . An FBI spokeswoman says the hole is bullet-sized , but not necessarily from a gun . The plane was carrying about 100 passengers and crew members when it went down at around 12:30