From The Washington Post:
In the aftermath of the Mumbai terrorist attacks, the CIA orchestrated back-channel intelligence exchanges between India and Pakistan, allowing the two former enemies to quietly share highly sensitive evidence while the Americans served as neutral arbiters, according to U.S. and foreign government sources familiar with the arrangement.
The exchanges, which began days after the deadly assault in late November, gradually helped the two sides overcome mutual suspicions and paved the way for Islamabad's announcement last week acknowledging that some of the planning for the attack had occurred on Pakistani soil, the sources said.
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My Comment: Someone had to be the intermediary between the two countries .... I guess the CIA was in the neighborhood.