TEHRAN -- Sensitive Israeli documents obtained by Tehran should be unveiled soon, Minister of Intelligence Esmail Khatib told national TV on Sunday, describing them as a “treasure trove” which will strengthen Iran’s offensive capabilities.
Sources familiar with the matter told national broadcaster IRIB on Saturday that Iranian intelligence agencies had obtained a large trove of sensitive Israeli documents. Khatib said these were related to Israel’s nuclear facilities and its relations with the United States, Europe and other countries, and to its military capabilities.
“The transfer of this treasure trove was time-consuming and required security measures. Naturally, the transfer methods will remain confidential but the documents should be unveiled soon,” Khatib said, adding that in terms of volume, “talking of thousands of documents would be an understatement.”
Asked whether there are actually “thousands” of documents, he said, “This is a very major development, and in fact, ‘thousands of documents’ is a very small term compared to what has been acquired.”
Khatib said the “comprehensive and complex operation” was carried out inside the Israeli occupied territories and “achieved an important treasury of strategic, operational and scientific intelligence of the Zionist regime and it was transferred into the country with God’s help”.
The revelation comes more than two weeks after Israeli regime authorities announced the arrest of two men on suspicion of committing “security crimes” on behalf of Iran.
However, Khatib said the transmission methods remain protected and will not be released anytime soon. “But we will publish the documents soon, InshaAllah (God willing),” he added.
Israeli media said the operation indicates “major infiltration” by the Islamic Republic. 
Israel’s Channel 12 said Iran has described the operation as a “painful blow” to the regime.
Israel’s leading news website Walla, quoting Lebanon’s Al-Mayadeen television, said Iran had succeeded in obtaining a huge volume of strategic and sensitive documents and information belonging to Israel, among which information and documents related to Israel’s nuclear programs and facilities are particularly prominent.
“The breadth and quality of the documents indicate major infiltration into Israel, and it is expected that their review will take a significant amount of time,” Walla said. “However, it is said that Iranian officials intend to release more details and videos in this regard in the near future.”
The leading news website stressed that the special security commissioner of the Israeli war ministry, which is responsible for the security and protection of Israel’s nuclear facilities, had in a call with Walla said, “We do not comment on these reports.” 
The Hebrew-language Maariv daily newspaper referred to the event as “concerning.”
The headline of their news item reads, “A concerning report: Iran has stolen Israel’s secret nuclear documents.”
Maariv stated that, the Iranian intelligence service has “succeeded” in acquisition of “thousands of confidential documents related to Israel’s nuclear facilities and strategic projects and transferring them to secure locations inside Iran.”
Israel Hayom, an Israeli Hebrew-language daily newspaper, citing Iranian media and Al-Mayadeen network, underlined that the documents obtained from Israel include highly sensitive documents related to Israel’s nuclear program.
Israel, widely regarded as one of the nuclear powers, launched its nuclear program in 1952 with technological support from France and the United States.
The first known nuclear weapons were developed by the regime around 1967-1968, according to various military think tanks. After that, the production accelerated rapidly, without any outcry.
In 1986, a technician at the Dimona nuclear facility, Mordechai Vanunu, exposed the regime’s clandestine nuclear program, for which he in 1988 was convicted of treason and sentenced to 18 years.