Iran nuclear talks may have been disrupted by spy virus attacks. According to reports, the computer virus that targeted three hotels hosting Iran talks is mostly used by Israeli spies.

Kaspersky Lab ZAO, a Russian computer security firm, discovered the virus in 2014. It reported that three luxury hotels in Europe turned out to be the victims. The company scanned millions of computers in thousands of hotels which had come out clean. Those three hotels have one thing in common. They became targets of the virus attack just before hosting Iran talks with six world powers.

The Wall Street Journal reported that Kaspersky would release its findings Wednesday. The revelations may also give strong evidence that Iran nuclear talks were targeted by the spy virus.

Kaspersky said the virus was an upgraded version of Duqu, first identified in 2011. According to a number of security experts, Duqu has been designed by Israel to carry out espionage.

Iranian government-run Press TV reported that there were several hotels which had hosted the talks. The hotels include the Hotel Bayerischer Hof in Munich, the Palais Coburg in Vienna, the Hotel President Wilson, Royal Plaza Montreux and Beau-Rivage Palace in Lausanne, Switzerland.

Israel warns that Iran may be allowed to work on nuclear weapons even if the agreement is finalized. Iran says it is working only on developing nuclear power.

The Russian company has not explicitly identified Israel as the country behind the spy attack as a part of its company policy. 

Israeli Prime Minister Benjamin Netanyahu said again Tuesday that the Iran deal would not stop the Islamic Republic from achieving nuclear power. "I know I'm often portrayed as the nuclear party pooper, and that would be okay if I was the only voice against the impending deal with Iran," Yahoo News quoted Netanyahu.

“But I speak with quite a few with our neighbors, more than you think,” Netanyahu said. The Israeli premier said no Arab country believed that the deal would stop Iran.