Tehran: Iranian scientists have produced the nation's first nuclear fuel rod, a feat of engineering the West has doubted Tehran capable of, the country's nuclear agency said on Sunday.

The announcement marks another step in Tehran's efforts to achieve proficiency in the entire nuclear fuel cycle - from exploring uranium ore to producing nuclear fuel - despite UN sanctions and measures by the US and others to get it to halt aspects of its atomic work that could provide a possible pathway to weapons production.

Tehran has long said it is forced to seek a way to manufacture the fuel rods on its own, since the sanctions ban it from buying them on foreign markets. Nuclear fuel rods are tubes containing pellets of enriched uranium that provide fuel for nuclear reactors.