31.   Officials are investigating the crash that killed three elementary school students and injured four.

32.   Police are investigating the crash, which witnesses said occurred when the car swerved and crashed into a tree.

33.   Putin also ordered his top security and police officials to dispatch a rescue crew immediately to investigate the crash.

34.   Several agencies, including the National Transportation Safety Board and the New Jersey State Police, were investigating the crash.

35.   She said the NTSB will serve as the lead agency investigating the crash, which could take up to nine months.

36.   The action means that the crash is being investigated as an accident, not as a terrorist attack.

37.   The Boeing official is being sent at the request of Cameroon officials investigating the crash, the Boeing spokeswoman said.

38.   The class decided to investigate the crashes and find out who the cadets were and where they were buried.

39.   The crash is being investigated by the National Transportation Safety Board.

40.   The Egyptian theory has been informally rejected by experts at the National Transportation Safety Board, which investigates crashes, but Egypt is pressing its case.