TEHRAN: Western powers are trying to "cheat" Iran through a UN-brokered deal for supplying nuclear fuel to a Tehran research reactor, parliament speaker Ali Larijani said on Saturday.

"Westerners are insisting to go in a direction that speaks of cheating and are imposing some things on us," Larijani told ISNA news agency.

"They are saying we will give you the 20 percent (enriched uranium) fuel for the Tehran reactor only if you give us your enriched uranium. I see no link between these two things."

Under a deal brokered by the International Atomic Energy Agency, Iran would ship out its low-enriched uranium to be further enriched and converted into nuclear fuel for powering a reactor in Tehran.

Iran was to give its response to the deal on Friday, but instead said it will offer it next week.