Iran's IAEA envoy Ali-Asghar Soltanieh says Tehran is determined to follow up its nuclear program, IRNA reported.
Speaking to Fox News, Soltanieh said Iran does not seek nuclear weapons and will not suspend enrichment.
He said no one would dare to attack Iran and any move on part of Israel will be dealt with Iran's iron feast.
Elsewhere in his remarks, Soltanieh refuted the IAEA Chief Yukiya Amano's statement and said Iran is not after nuclear weapons and Tehran's nuclear program is solely peaceful.
Amano said last month Iran has tripled its monthly production of higher-grade enriched uranium and the U.N. nuclear watchdog had "serious concerns" about possible military dimensions to Tehran's atomic activities.
Soltanieh went on to stress that Iran will never suspend its nuclear activities, including uranium enrichment, as is referred to in the UN Security Council resolutions.
He said Tehran would not allow any country to knock Iranian nuclear facilities' doors whenever it likes to visit them.
Soltanieh also rejected the point that international sanctions would force Iran to make concessions.
Sanctions would not have any effect and "we are decisive to follow up our nuclear activities", he said.
Soltanieh then touched on Iran-G5+1 talks, saying Tehran has provided the West with a chance to settle problems. "If you order Iranian people to do something, their response will be "no" but if you ask them to do so, they will be flexible."