Iranian nuclear negotiator Saeed Jalili has called for the disarmament of all nations with atomic weapons, but said all countries have the right to develop nuclear energy.

Jalili insisted that his country's nuclear program is for civilian purposes, although the U.S. and other nations fear it is to produce weapons. He was on a visit to Japan when he made his remarks Monday.

"The crime that was committed in Hiroshima must never be repeated," he told reporters, referring to the bombing of Hiroshima at the end of World War II.

President Barack Obama's administration has given a rough deadline of year-end for Iran to respond to an offer of engagement and show that it would allay world concerns about its nuclear program.