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Report: Zygier told ASIO of Mossad plans
Sources told the Australian ABC network that Ben Zygier was arrested by the Mossad because they believed he gave a detailed account of Israel's activities to the Australian ASIO.

 

According to sources, Zygier met with ASIO a few times in Australia and during one of the meetings, rovided them with detailed accounts of a few Mossad operations, including the plans for a secret mission in Italy being planned for years. (Ynet)