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Scotland Yard is investigating the death of an Egyptian billionaire suspected of being a Mossad spy. Ashraf Marwan's body was found yesterday on the pavement beneath the balcony of his fourth-floor London flat. Friends said Marwan, who was 62, feared assassination since 2004 when it was first reported that he passed intelligence to Israelis before the 1973 Yom Kippur War.

Son-in-law of the late Egyptian President Nasser, Marwan was believed to be working for the Israelis, and was accused of tipping them off to Egypt and Syria's pending sneak attack. But other information indicates he was a double agent whose true loyalties lay with Egypt, and that he didn't warn Israel until several hours too late. (Read more Egypt stories.)