61.   The cause was being investigated, fire officials said.

62.   The FAA said it is investigating the cause of the cabin pressure fluctuation.

63.   The maritime safety agency, which has been investigating the cause of the accident, said yesterday it will turn the case over to public prosecutors.

64.   The Navy is investigating the cause.

65.   The Justice Department is investigating possible causes.

66.   The National Transportation Safety Board also is investigating the causes of the crash.

67.   The National Transportation Safety Board dispatched a team from Washington to the site of the accident to investigate the cause.

68.   The White House spokesman, Ari Fleischer, said the Defense Department was investigating the cause of the crash.

69.   There were no other vehicles involved, and officers were investigating the cause of the crash.

70.   They said they would immediately begin investigating possible causes.