From CNN:
(CNN) -- The United States warned the Indian government about a potential maritime attack against Mumbai at least a month before last week's massacre in the country's financial capital left nearly 180 dead, a U.S. counterterrorism official told CNN.
U.S. intelligence indicated that a group might enter the country by water and launch an attack on Mumbai, said the source, who refused to be identified due to the ongoing investigation into the attacks and the sensitivity of the information.
Indian security forces have confirmed to CNN that not only did U.S. officials warn them of a water-borne attack in Mumbai -- they were told twice. The area entered a higher state of alert for a week, including tightened security measures at hotels, but those efforts were eventually reduced, Indian officials said.
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My Comment: The Indian security officials went through the motions .... but it is obvious that they were not serious about the threat.