The son of one of Hamass founding members was a spy in the service of Israel for more than a decade, helping to prevent dozens of Islamist suicide bombers from finding their targets, it emerged yesterday. Codenamed the Green Prince by Shin Bet, Israels internal security service, Mosab Hassan Yousef, the son of the Hamas co-founder Sheikh Hassan Yousef, supplied key intelligence almost daily from 1996. He tracked down suicide bombers and their handlers from his fathers organisation, the Haaretz newspaper said. Information supplied by him led to the arrests of some of the most- wanted men by Israeli forces, including Marwan Barghouti, a Fatah leader tipped as a potential president, who was convicted of masterminding terrorist attacks, along with one of Hamass top bombmakers, Abdullah Barghouti, who is no relation of the jailed Fatah chief. Mr Yousef, 32, a convert to Christianity who now lives in California, has revealed the intrigues of his years as a spy in a new book called Son of Hamas, much to the concern of Shin Bet, whose operations will be revealed in detail. While the revelations may give a boost to Israels intelligence service, whose external counterpart, Mossad, is still grappling with the diplomatic fallout of last months Hamas assassination in Dubai, there will be concern that the account may give too many insights into the murky world of espionage. Mr Yousefs work will be far more damaging to Hamas, whose brutality he denounced. Dubai police have suggested that Mahmoud al-Mabhouh, the top Hamas militant found dead in a hotel room in the emirate on January 20, may have been betrayed by an insider from the Islamist movement. Mr Yousef had harsh words for the movement that his father helped to form, and which now rules the Gaza Strip after a bloody takeover in the summer of 2007. Hamas cannot make peace with the Israelis, he said. That is against what their God tells them. It is impossible to make peace with infidels, only a ceasefire, and no one knows that better than I. The Hamas leadership is responsible for the killing of Palestinians, not Israelis. Hamas issued a muted reaction to the report, with Mahmoud al-Ramahi, a West Bank official, saying that it was designed to sow confusion in the minds of Palestinians and make them believe the movement was riddled with high-level moles. Mr Yousefs former Israeli handler, identified only as Captain Loai, praised the resolve of his agent, whose codename derived from the colour of Islam and Hamass banner and from his exalted position within an organisation that regularly kills those suspected of collaborating with the Jewish state. So many people owe him their life and dont even know it, he said. The amazing thing is that none of his actions were done for money. He did things he believed in. He wanted to save lives. His grasp of intelligence matters was just as good as ours the ideas, the insights. One insight of his was worth 1,000 hours of thought by top experts. Mr Yousef, whose father is still in an Israeli jail cell, from where he was elected as an MP in 2006, went as far as tracking down would-be kamikazes himself in the streets of the West Bank during the second intifada (uprising), which erupted a decade ago and left thousands of Palestinians and Israelis dead. On one occasion he followed a bomber from Manara Square in the centre of Ramallah, just north of Jerusalem. We didnt know his name or what he looked like only that he was in his 20s and would be wearing a red shirt, said the former handler. We sent the Green Prince to the square and with his acute sense, he located the target within minutes. He saw who picked him up, followed the car and made it possible for us to arrest the suicide bomber and the man who was supposed to give him the belt. So another attack was thwarted, though no one knows about it. No one opens champagne bottles or bursts into song and dance. This was an almost daily thing for the Prince. He displayed courage, had sharp antennae and an ability to cope with danger. Mr Yousef, who converted from Islam to Christianity a decade ago in itself a dangerous act was arrested by the Israelis in 1996. Within a year he had been recruited by Shin Bet, was released, and began working as an informant. Speaking by telephone from California, Mr Yousef told Haaretz he worried that the Israeli Government might release some of the prisoners he helped to put behind bars in exchange for Gilad Schalit, a young Israeli soldier abducted by Hamas from the Gaza border more than three years ago. I wish I were in Gaza now, he said. I would put on an army uniform and join Israels special forces in order to liberate Gilad Schalit. If I were there, I could help. We wasted so many years with investigations and arrests to capture the very terrorists that they now want to release in return for Schalit. That must not be done. The dangerous game In 1954 Egypt cracked an Israeli spy cell of nine Egyptian Jews who had firebombed sites frequented by Westerners. The agents hoped Egyptian extremists would be blamed, embarrassing Cairo into halting plans to nationalise Suez Isser Harel headed Mossad in the 1950s when it tracked down fugitive ex-Nazi leaders including Adolf Eichmann, right. In Operation Eichmann, a team of eleven tracked their quarry for two years before kidnapping him. The drugged Eichmann was taken to Israel on the same aircraft that was carrying the Israeli Foreign Minister Eli Cohen, an Egyptian-born Jew, became an Israeli spy in the 1960s and was sent to Syria in the guise of a wealthy Arab. He infiltrated the Syrian defence establishment and toured military installations in the Golan Heights. In 1965 he was caught and executed but his work was said to have helped Israel to victory in the Six Day War of 1967 In 1985 Jonathan Pollard, an analyst for the US Navy, was jailed for life for passing intelligence to an Israeli agency that collected technical information. He was said to have stolen more than a million classified documents. (The Times)