Indonesian officials say rescue crews are making their way to the crash site of a passenger plane, but mountainous terrain is making communication difficult.
Search and Rescue Commander Idin Arifin says rescuers are having trouble spotting the exact location where the Adam Air passenger jet went down Monday. He says teams are looking for the wreckage Tuesday in an area of thick jungle and steep terrain on northern Sulawesi island.
Ninety people died in the crash, and unconfirmed reports say 12 people survived.
Three U.S. citizens were among the passengers. Their condition is unknown.
The 17-year-old Boeing 737 was en route from Java to north Sulawesi when it lost contact with air traffic controllers.
Transport Minister Hatta Radjasa says bad weather caused the crash and that an investigation is under way. He says it is the airport's responsibility to cancel flights in case of severe weather.
Radjasa says air traffic controllers received clearance from Indonesia's weather bureau, but conditions changed quickly during the flight.
Adam Air is a privately owned, low-cost airline flying mainly domestic routes in Indonesia.
