In a letter to the UN secretary general, Iran claimed that the murders followed a clear pattern, and added: “There is firm evidence that certain foreign quarters are behind such assassinations.

“It is highly expected from the Secretary-General of the United Nations, and President of the Security Council of the United Nations as well as all other relevant organisations and bodies to condemn, in the strongest terms, these inhumane terrorist acts.”

The most recent ‘attack’ involved a blast in Tehran on Wednesday morning that killed nuclear scientist Mostafa Ahmadi Roshan.

According to reports, a motorcyclist placed a magnetic bomb under Roshan’s Peugeot 405. The wrecked car is pictured above.

Two other scientists have died in a similar fashion in the capital city over the past two years.

In an interview with CNN last night, Iran’s UN ambassador Mohammad Khazaee blamed Israel for the attacks.

“They are trying to assassinate the Iranian scientists to deprive Iranians from the right of using peaceful nuclear energy,” Khazaee said.

“We believe that these terrorist attacks are supported by some elements – especially within the Israeli regime as well as some quarters around the world.”

There have also been accusations within Iran of US involvement, while state-run news agency IRNA said that the UN’s nuclear watchdog, the International Atomic Energy Agency, was at fault for passing on information about Iran’s nuclear scientists to other countries.

US secretary of state Hillary Clinton responded: “I want to categorically deny any United States involvement in any kind of act of violence inside Iran.

“We believe there has to be an understanding between Iran, its neighbours and the international community that finds a way forward for it to end its provocative behaviour, end its search for nuclear weapons and rejoin the international community and be a productive member of it.”

According to CNN, Israel’s spokesman for the Israel Defence Forces, Yoav Mordechai, posted on his Facebook page: “I have no idea who targeted the Iranian scientist but I certainly don’t shed a tear.”

Picture: Getty