The International Atomic Energy Agency has warned against Iranian expansion of uranium beyond the highly enriched threshold of 20 per cent purity. The UN nuclear watchdog said it will ”increase the frequency and intensity of its safeguards activities” at the Natanz uranium enrichment facility 250 km (155 miles) south of the Iranian capital Tehran. Earlier, Iran was already enriching its uranium to 60 per cent at the Pilot Fuel Enrichment Plant (PFEP). The 20 per cent addition… – WION Photo: Atomic Energy Organization of Iran