1.   But investigators cautioned it was not likely to lead to genetic screening.

2.   But the independent crash investigators cautioned that asymmetric lift could also be caused by a mechanical problem.

3.   But the investigators cautioned that they have no hard evidence of the payments.

4.   But the work is still highly preliminary, the investigators caution.

5.   But, several investigators cautioned, the disclosure of the bomb-sniffing dog test does not rule out the validity of the chemical traces, either.

6.   Federal investigators cautioned not to read too deeply into the list of items, which they have refused to publicly elaborate upon.

7.   Federal investigators cautioned Sunday that the search could take months and that the cause of the crash might never be determined.

8.   Here, too, the investigators cautioned that before examining the parts they had no concrete evidence suggesting that the rudder was involved in this accident.

9.   Here, too, the investigators cautioned that they had no concrete evidence suggesting that the rudder was involved.

10.   Investigators cautioned, however, that it was far too early to draw any definitive conclusions.