Israel has confirmed it jailed a foreigner in solitary confinement on security grounds who later committed suicide, as Australia admitted Thursday it knew one of its citizens had been secretly held.

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.

A book on the Israeli secret service, Mossad, revealed the details of the assassination of Hizbullah prominent official Imad Mughnieh in Syria in 2008, reported al-Khaleej newspaper on Tuesday.

Mossad: The Greatest Missions of the Israeli Secret Service by Michael Bar-Zohar and Nissim Mishal dedicated a whole chapter to the assassination of the secretive Hizbullah official, who was killed in car bomb in Damascus.

Israel has for the first time admitted assassinating the PLO's former number two, Abu Jihad, in a raid on the movement's Tunis headquarters in 1988, a newspaper reported on Thursday.

The report, published in Israel's top-selling Yediot Aharonot, said the operation was planned by the Mossad spy agency and carried out by the Sayeret Matkal commando unit.

WikiLeaks website has revealed that Israeli intelligence, Mossad, may have been involved in the 2010 Ethiopian plane crash off Beirut's shore, said various media reports on Sunday.

They said that the plane have been the victim of sabotage by Israeli intelligence because it mistakenly suspected that senior Hizbullah official Hashem Safieddine may have been on the flight.

A Lebanese man accused of helping to plot an attack on Israeli tourists in Cyprus will go on trial before a criminal court on the resort island on September 12, state media reported on Friday.

His case was committed to trial after he appeared before a district court in the island's second city Limassol under tight security on Friday.

A Hamas member was killed Wednesday in a suburb of the Syrian capital Damascus, a senior member of the group told Agence France Presse, adding that they suspected Israel's spy agency of being behind the attack.

The victim was Kamal Hussein Ghannaje, said the official, speaking under condition of anonymity.

Iran on Thursday said it arrested a number of chief suspects in the assassinations of two of its nuclear scientists in the past two years, and claimed they were linked to Israel.

A statement from the intelligence ministry, published by state media, said "the main elements behind the killings... were arrested and moved to detention" following an investigation of at least 18 months involving surveillance in Iran and abroad.

Iran on Tuesday hanged a man convicted of playing a key role in the 2010 murder of a top nuclear scientist and of spying for Israel, the official IRNA news agency reported quoting Tehran prosecution office.

"Majid Jamali Fashi, the Mossad spy and the person who assassinated Masoud Ali Mohammadi, our nation's nuclear scientist was hanged Tuesday morning," IRNA said.

The Internal Security Forces Intelligence Branch has arrested six people on suspicion of collaborating with Israel, As Safir newspaper reported on Tuesday.

The daily said one of the suspects is a former member of the South Lebanon Army militia and hails from the southern village of Kfarkila.

Israel revealed that an attempt to assassinate Defense Minister Ehud Barak was foiled during his trip to Singapore on Monday, reported Kuwait’s al-Jarida newspaper on Thursday, in remarks swiftly denied by an Israeli defense official and Singaporean police.

High-ranking Israeli sources said: “A joint cell from Iran and Hizbullah plotted the attempt to kill the minister.”