The man, identified by Australian media as Mossad agent Ben Zygier, known as “Prisoner X”, died in a secret prison near Tel Aviv in 2010 in a case Israel went to extreme lengths to cover up, imposing media gag orders.
Tel Aviv broke its silence after the Australian Broadcasting Corporation said the man was a dual Australian-Israeli citizen and reported that he was a spy for Israel’s intelligence agency.
“For security reasons the man was held under a false identity although his family was immediately informed of his arrest,” Israel’s justice ministry said.
The man was found dead in his cell and a judicial inquiry ruled he took his own life, the ministry added in a statement, although it did not reveal his identity or the charges against him.
“Following an extensive investigation it was ruled six weeks ago that it was suicide,” said the ministry. “The prisoner was held in jail under a warrant issued by a court.”
But other details of the case remained under a gag order, leaving local media obliged to quote foreign reports.
Australian Foreign Minister Bob Carr initially said he only became aware of the man’s incarceration after his death, but on Thursday admitted the government knew of his detention at the time.
He told a parliamentary committee the information was gathered through intelligence channels.
“They provided the name of the citizen, in relation to serious offences under Israeli national security legislation,” he said, adding that Canberra sought assurances that he was not being mistreated.
He said at no stage did the government receive any request for consular support, adding that he would determine Canberra’s next step after receiving a full report from his department into the case.
“With the benefit of that full report, I’ll determine what representations to the government of Israel are most useful,” he said.
The story first emerged in June 2010 when Israel’s Ynet news website briefly ran a report about a prisoner being held in top secret conditions whose identity and alleged crime were not even known to his jailers.
The story was quickly taken offline and a complete media blackout imposed, but it resurfaced on Tuesday through Australia’s public broadcaster.