Agents with Israel's Mossad agency posed as American CIA agents in operations to recruit members of the Pakistani militant group Jundallah to attack Iranian targets, a report in Foreign Policy magazine said Friday.

Using American dollars and U.S. passports, the agents passed themselves off as members of the Central Intelligence Agency in the operations, notably in London, according to memos from 2007 and 2008, said the report.

Iran's supreme leader has accused the U.S. and Israeli intelligence services of being behind the "abominable" assassination in Tehran this week of a nuclear scientist who was to be buried Friday.

The "cowardly murder" on Wednesday of Mostafa Ahmadi Roshan, a deputy director of Iran's main uranium enrichment plant, was committed "with the planning or support of the intelligence services of the CIA and Mossad," said Ayatollah Ali Khamenei.

Israel is concerned Hizbullah will try to attack Israelis overseas in the coming weeks and ahead of the fourth anniversary of the assassination of the party’s military commander Imad Mughniyeh, The Jerusalem Post reported.

Mughniyeh was killed in a car bombing in Syria on Feb. 12, 2008. Hizbullah has accused Israel's intelligence service Mossad of assassinating him.

Authorities in Mauritania have exposed a major Israeli spy network comprising a member involved in the “bombing” of the Ethiopian plane which crashed into Lebanon’s territorial waters on January 25, 2010, a Mauritanian website has reported.

An Arab businessman heads the alleged Mossad network, elhourriya.net said.

The head of Israel's Mossad spy agency has said a nuclear Iran might not pose an "existential threat" to the Jewish state, in remarks reported Thursday by Haaretz newspaper.

"Does Iran pose a threat to Israel? Absolutely," the daily quoted Mossad chief Tamir Pardo as telling a group of Israeli ambassadors.

Hizbullah sources denied on Friday that it had received word that the Special Tribunal for Lebanon had received a memorandum from former Prosecutor of the International Criminal Tribunal for the former Yugoslavia Marwan Dalal confirming Israel’s involvement in the 2005 assassination of former Prime Minister Rafik Hariri.

The sources told Akhbar al-Yawm news agency: “This is a new test of the STL’s credibility.”

A U.S.-Israeli citizen accused of spying in Egypt arrived in Tel Aviv on Thursday, Israeli media said, freed under a prisoner exchange deal that saw Israel release 25 Egyptian detainees.

Israeli television and radio reported that Ilan Grapel had touched down at Israel's Ben Gurion airport at around 1630 GMT, arriving on a private plane from Cairo, accompanied by Israeli officials.

The trial opened in Egypt on Sunday of a Jordanian and Israeli charged with spying for the Jewish state's intelligence services and was swiftly adjourned to next week, an Agence France Presse reporter said.

The Israeli defendant was being tried in absentia.

A Hizbullah member escaped to Israel last June after the Shiite party’s leader Sayyed Hassan Nasrallah unveiled that the group had captured three spies among its members, two of whom were allegedly recruited by the U.S. Central Intelligence Agency, An Nahar daily reported Friday.

Nasrallah said at the time that CIA members at the U.S. embassy had recruited at least two Hizbullah members and the group was investigating whether the intelligence agency or another foreign agency recruited a third.

One of the four Hizbullah members accused of involvement in ex-Premier Rafik Hariri’s assassination has said that the Lebanese authorities would have arrested him if they wanted to.

"I don't care about the indictments. Let them come to arrest me," the man told TIME in an exclusive interview, which he gave on condition of anonymity despite having been publicly named by the Special Tribunal for Lebanon among the four suspects.