21.   Investigators are still studying the accident.

22.   Investigators are studying the wreck to determine what caused the accident.

23.   Investigators have studied a videotape from a camera mounted inside the bus and have talked to a child who was wearing a lapbelt and was the least injured.

24.   Investigators were wearily studying their umpteenth shipping manifest when there it was.

25.   It said investigators are studying maintenance records for the part.

26.   McMahon said investigators were studying the affiliation of the Oregon poplar farm with the Washington research site.

27.   Materials seized elsewhere can be studied by investigators checking allegations that Mrs. Mandela took bribes from a building firm in exchange for a contract to build low-income housing.

28.   Nilsen told the Norwegian news agency NTB that investigators were studying all possibilities, including sabotage and an accidental sinking.

29.   She said investigators were studying the movement of federal agents on the day of the crime as well as the lack of interviews with some witnesses.

30.   Swedish investigators already studied the possible South African connection a year after Palme was gunned down on a Stockholm street.