"All three attacks resulted in only property damage, and only Mebus' dog was killed," it said

Israel's espionage agency Mossad is suspected of having bombed and issued threats to German and Swiss companies that "energetically worked" to aid Pakistan in its nascent nuclear weapons program in the 1980s as the Jewish state saw Islamabad acquiring nuclear capabilities as an "existential threat", a leading daily said here on Tuesday.

The Jerusalem Post quoted a prominent Swiss daily report that "the suspicion that Mossad carried out the attacks and issued threats soon arose" after the three bombings in 1981 on three of these companies following an unsuccessful intervention by the United States to stop the activities".

"For Israel, the prospect that Pakistan, for the first time, could become an Islamic State with an atomic bomb posed an existential threat," Swiss daily Neue Zurcher Zeitung (NZZ) reported on Sunday.

Pakistan on May 28, 1998 conducted five simultaneous underground nuclear tests at Ras Koh Hills in Chagai district of Baluchistan province. Codenamed Chagai-I, it was Pakistan's first public test of nuclear weapons. The second nuclear test, Chagai-II, followed on May 30 in the same year.

Pakistan and the Islamic Republic of Iran worked closely together in the 1980s on developing nuclear weapons devices in which the intensive work of German and Swiss companies in aiding their nuclear program is "relatively well researched," NZZ reported.

"New, previously unknown, documents from archives in Bern and Washington sharpen this picture," it claimed.

Swiss historian Adrian Hanni is quoted to have said that Mossad was likely involved in the bomb attacks on Swiss and German companies even though there was no "smoking gun" to prove that the Israeli espionage agency carried out the attacks after these efforts were discovered.

The organisation for the Non-Proliferation of Nuclear Weapons in South Asia had claimed responsibility for the explosions in Switzerland and Germany.

NZZ report also mentions the role of disgraced late Pakistani nuclear scientist, Abdul Qadeer Khan, who crisscrossed Europe during the 1980s to secure technology and blueprints from Western institutions and companies to develop a nuclear bomb.

Khan is said to have met a delegation of Iran's Organisation for Atomic Energy in 1987 at a Zurich hotel. The Iranian delegation is said to have been led by Engineer Masud Naraghi, the chief of Iran's nuclear energy commission.

Two German engineers, Gotthard Lerch and Heinz Mebus along with Naraghi -- who did his Ph.D. in the US -- are said to have met Khan's group in Switzerland. Additional meetings reportedly happened in Dubai.

In view of Pakistan's "fast-moving efforts" to jumpstart its nuclear weapons programme, the US tried to convince German and Swiss governments to crack down on the aiding companies, but was unsuccessful, the report said.

Suspected Mossad agents are then said to have "taken action" against the companies and the engineers involved in aiding Pakistan.

"A few months after the unsuccessful intervention of the American state department in Bonn and Bern, unknown perpetrators carried out explosive attacks on three of these companies - on February 20, 1981 on the house of a leading employee of Cora Engineering Chur; on May 18, 1981 on the factory building of the Walischmiller company in Markdorf and on November 6, 1981, on the engineering office of Heinz Mebus in Erlangen," NZZ reported.

"All three attacks resulted in only property damage, and only Mebus' dog was killed," it said.

The explosions are said to have been followed by several phone calls in English and broken German in which strangers threatened other companies.

"The attack that we carried out against the Walischmiller company could happen to you too - this is how the Leybold-Heraeus administration office was intimidated.

"Siegfried Schertler, the owner of VAT at the time and his head salesman Tinner were called several times on their private lines. Schertler also reported to the Swiss Federal Police that the Israeli secret service had contacted him. This emerges from the investigation files, which the NZZ was able to see for the first time," the report said.

Scertler was quoted as saying that an employee of the Israeli embassy in Germany, David, contacted him. David is said to have urged him to stop "these businesses" regarding nuclear weapons and switch to the textile business. Swiss and German companies made huge gains from their association with the Khan nuclear weapons network.

"Many of these suppliers, mainly from Germany and Switzerland, soon entered into business worth millions with Pakistan: Leybold-Heraeus, Walischmiller, Cora Engineering Chur, Vakuum-Apparate-Technik (VAT, with the chief buyer Friedrich Tinner) or the Buchs metal works, to name a few.

"They benefited from an important circumstance: the German and Swiss authorities interpreted their dual-use provisions very generously: Most of the components that are required for uranium enrichment, for example, high-precision vacuum valves, are primarily used for civil purposes," NZZ reported.

The National Security Archive in Washington has also recently published diplomatic correspondence from the US State Department from Bonn and Bern in 1980 bringing new information out. The US seems to have resented the "casual handling of the delicate deliveries to Pakistan" by these two countries. Bern's behaviour was described by an employee as a "hands-off approach" and the local authorities were accused of "turning a blind eye" in these communications.

"In the now released dispatches, which were previously classified as secret, those companies are listed for the first time that the US has accused of supporting the Pakistani nuclear weapons programme with their deliveries.

"The list included around half a dozen companies each from Germany and Switzerland," the Swiss daily is said to have reported.