Iran has successfully enriched uranium for the first time, a landmark in its quest to develop nuclear fuel, hard-line President Mahmoud Ahmadinejad said Tuesday, although he insisted his country does not aim to develop atomic weapons.

In a nationally televised speech, Ahmadinejad called on the West "not to cause an everlasting hatred in the hearts of Iranians" by trying to force Iran to abandon uranium enrichment.

The announcement came ahead of a visit to Tehran this week by Mohamed ElBaradei, the head of the U.N. nuclear watchdog agency, who is trying to resolve the West's standoff with Iran. The U.N. Security Council has demanded Iran stop all enrichment activity by April 28. Iran has rejected this, saying it has a right to the process.

"At this historic moment, with the blessings of God almighty and the efforts made by our scientists, I declare here that the laboratory-scale nuclear fuel cycle has been completed and young scientists produced enriched uranium needed to the degree for nuclear power plants Sunday," Ahmadinejad said.

"I formally declare that Iran has joined the club of nuclear countries," he told an audience that included top military commanders and clerics in the northwestern holy city of Mashhad. The crowd broke into cheers of "Allahu akbar!" or "God is great!" Some stood and thrust their fists in the air.