conclusion of Iran nuclear investigation Vienna, Austria, Sept 14, SPA -- The head of the U.N. atomic watchdog agency said Tuesday that he could not guaranteehis investigation of Iran's suspect nuclear activities willbe finished by the November deadline being pushed by theUnited States and its European allies. Mohamed ElBaradei, chief of the International AtomicEnergy Agency, also repeated that his investigation has notdefinitely established whether Iran is trying to makenuclear arms _ as Washington asserts. "We haven't seen any concrete proof that there is aweapons program," he told reporters on the second day of akey meeting of the agency's board. "Can we say everythingis peaceful? Obviously we are not at that stage."--SP1518 Local Time 1218 GMT www.spa.gov.sa/201491