Iran's top nuclear negotiator Ali Larijani has criticized a plan to enrich uranium in Russia, saying Iran should have control over its nuclear activities.

Mr. Larijani told state-run television Sunday that officials are studying the Russian proposal aimed at resolving a dispute over Iran's nuclear program. But he said any plan should not block Iran from enriching uranium at home, saying it's not logical for Iran to rely on another nation for nuclear fuel.

Earlier, Iranian state media reported that the country has developed equipment to separate uranium from its ore - a key step in the nuclear fuel cycle.

U.S. and European officials have expressed concern that Iran may use enriched uranium to build nuclear weapons. Iran insists its nuclear program is peaceful.

Some information for this report was provided by AFP, AP, and Reuters.