Vienna, Sep 10 (DPA) There was a 'high probability' that Iran worked to develop nuclear weapons in the past, if intelligence information in that regard is genuine, International Atomic Energy Agency (IAEA) chief Mohamed ElBaradei said Wednesday in Vienna.

ElBaradei was referring to documents received by his organisation that points to a number of suspicious Iranian studies, including the modification of the model of a missile to carry a nuclear warhead.

'I am not a scientist, but I can tell you this: If this information is real, there is a high probability that nuclear weaponisation activities have taken place,' he said. 'But I should underline 'if' three times.'

Speaking at the board meeting of the IAEA, ElBaradei called on Iran to finally clarify these issues.