http://www.nytimes.com/2003/09/12/international/asia/12CND-TAPE.html?ex=1064030400&en=ce609ff56922d4b6&ei=5062&partner=GOOGLEWASHINGTON, Sept. 12 — A C.I.A. technical analysis has concluded that the voice on an audiotaped message broadcast this week and represented as that of Osama bin Laden is probably authentic, an official at the intelligence agency said today.
But the evaluation has not determined when the message was taped, and the official said that while the finding that the voice was that of Mr. bin Laden carried a high degree of certainty, the tests were not definitive and were continuing.
The audiotape and an accompanying videotape of Mr. bin Laden and his deputy, Ayman al-Zawahiri, was broadcast on Wednesday by an Arab satellite television network, Al Jazeera.
The network said the tapes were recorded in April and May. But the C.I.A. official said that the tape contained no references that would clearly show when it was made.
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