The Associated Press published a report on Tuesday informing people that Iranian scientists have run computer simulations for an atomic bomb thrice more destructive than the one used in Hiroshima. The news was confirmed by the diagrams of the Vienna-based International Atomic Energy Agency (IAEA) which prove that tests have been performed to calculate the “nuclear explosive yield” of new weapons.

The International Atomic Energy Agency is a U.N.-related organization in charge of supervising the peaceful use of nuclear energy and preventing nations from producing weapons. The agency became wary after graphs suggested that Iranian scientists are performing tests for highly dangerous weapons. The diagram was provided by two nations that wish to remain anonymous.

IAEA obtained the diagram last year, but they did not make any comments in relation to it until now. It was the Associated Press who first disclosed the information contained in the diagram because the figures indicate a massive use of nuclear energy.

The diagram illustrates a bell curve with time variables expressed in microseconds, whereas power and energy are expressed in kilotons. The fact that the curve peak registers 50 kilotons at around 2 seconds is the element that has suggested IAEA officials Iranian is preparing a nuclear weapon.

Judging by the information provided by the graph, the potential weapon could be much more powerful than the one used in the Hiroshima attack during World War II. The latter had a force of only 15 kilotons, so the Iran’s nuclear weapon could be thrice more powerful than the bomb dropped on Hiroshima.

According to AP reporters, the diagram is accompanied by a caption written in Farsi. The message says that the changes in output and in energy are released as a function of time through power pulse. The diagram also contains the number “5” in the title, which was interpreted as a part of a series by scientists.

Ali Asghar Soltanieh, Iran’s chief IAEA’s delegate, stated that he was not aware of the existence of the diagram. Iran claims the nuclear tests are being performed for scientific reasons and reassures the U.N. that they have no interest in such a weapon.