Mossad spy Ben Zygier reportedly spilled secrets to Hezbollah leading to his imprisonment An undated picture of Ben Zygier, a reported Mossad spy who died in 2010 in Israel's Ayalon Prison. News weekly Der Spiegel said Ben Zygier, a man known as "Prisoner X" who died in 2010 in an allegedly suicide-proof cell, had handed tips to the Lebanese militant group that led to the arrest of at least two people spying for Israel. After conducting its own "internal investigations," the report found that Zygier had started working for Mossad in 2003, investigating European companies doing business with Iran and Syria. It said Zygier - who was raised in Melbourne but moved to Israel about a decade before his death - was ordered back to Israel in 2007 because his bosses were unhappy with his work. The report said Israeli security authorities had told Zygier after his arrest that they wanted to make an example of him and demanded a prison sentence of at least 10 years. Zygier was found dead in his cell in December 2010 at the age of 34. Opposition foreign affairs spokeswoman Julie Bishop said the allegations were internal matters of national security for Israel's intelligence agency, But the coalition still had unresolved questions about how Mr Zygier's case was handled by consular staff in Australia. Ms Bishop said no effort was made to contact his family or to offer consular assistance to Mr Zygier, an Australian in prison overseas. It "beggars belief" that Stephen Smith could still claim he recalled nothing of the case despite being foreign minister at the time and the matter relating to national security and intelligence. "This minister Stephen Smith didn't even bother to find out if the family or indeed Mr Zygier required assistance" she told Sky News on Monday. It was time for ``frank and honest answers" from the government about this matter.