Iran's supreme leader Ayatollah Ali Khamenei has rejected allegations that Tehran was working to make a nuclear weapon. Speaking on national television, Khamenei repeated that Iran's nuclear programme was intended solely for peaceful energy purposes. He said that no wise nation  would be interested in making nuclear bombs, calling them useless. His comments come a day after the chief of the UN atomic watchdog, Mohamed ElBaradei, urged "full disclosure" from Iran over charges that Tehran is hiding information about its nuclear programme.