The C.I.A. Helped Pinpoint a Gathering of Iranian Leaders. Then Israel Struck.

The killing of Iran’s supreme leader and other top Iranian officials came after close intelligence sharing between the United States and Israel, according to people familiar with the operation.

Shortly before the United States and Israel were poised to launch an attack on Iran, the C.I.A. zeroed in on the location of perhaps the most important target: Ayatollah Ali Khamenei, the country’s supreme leader.

The C.I.A. had been tracking Ayatollah Khamenei for months, gaining more confidence about his locations and his patterns, according to people familiar with the operation. Then the agency learned that a meeting of top Iranian officials would take place on Saturday morning at a leadership compound in the heart of Tehran. Most critically, the C.I.A. learned that the supreme leader would be at the site.

The United States and Israel decided to adjust the timing of their attack, in part to take advantage of the new intelligence, according to officials with knowledge of the decisions.

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