This handout picture released by Iran's Atomic Energy Organization on Nov 4, 2019 shows the atomic enrichment facilities at the Natanz nuclear research center, some 300 kilometers south of the capital Tehran. (HO / ATOMIC ENERGY ORGANIZATION OF IRAN / AFP)

Iran has made 6.5 kg of uranium enriched to up to 60 percent, the government said on Tuesday, detailing a move that rattled the country's nuclear talks with world powers by taking the fissile material a step towards nuclear weapons-grade of 90 percent.

Government spokesman Ali Rabiei was quoted by state media as saying the country had also produced 108 kg of uranium enriched to 20 percent purity, indicating quicker output than the rate required by the Iranian law that created the process.

Tuesday's disclosure came as Tehran and Washington hold indirect talks in Vienna aimed at finding ways to revive a 2015 nuclear deal between Iran and world powers

Iran said in April it would begin enriching uranium to 60 percent purity, a move that would take the uranium much closer to the 90 percent suitable for a nuclear bomb, after Tehran accused arch-foe Israel of sabotaging a key nuclear site. 

ALSO READ: Iran says still enriching uranium at 60% purity

Tuesday's disclosure came as Tehran and Washington hold indirect talks in Vienna aimed at finding ways to revive a 2015 nuclear deal between Iran and world powers.

Iran’s hardline parliament passed a law last year to oblige the government to harden its nuclear stance, partly in reaction to former President Donald Trump’s withdrawal from the nuclear deal in 2018.

Trump’s withdrawal prompted Iran to steadily overstep the accord’s limits on its nuclear program designed to make it harder to develop an atomic bomb - an ambition Tehran denies.

READ MORE: EU rebukes Iran over nuclear inspections ahead of Vienna talks

"Under parliament's law..., the Atomic Energy Organization was supposed to produce 120 kg of 20 percent enriched uranium in a year. According to the latest report, we now have produced 108 kg of 20 percent uranium in the past five months," Rabiei was quoted as saying.

"In the area of 60 percent uranium production, in the short time that has elapsed..., about 6.5 kg has been produced," Rabiei added.

According to a quarterly report on Iran’s nuclear activities by the UN nuclear watchdog in May, as of May 22, Tehran had produced 62.8 kg of uranium enriched up to 20 percent, and 2.4 kg of uranium enriched up to 60 percent, with the next level down being enriched to between 2 percent and 5 percent.