Iran says it will stop cooperation with the United Nations' nuclear agency if the Security Council imposes sanctions.

Top Iranian nuclear negotiator Ali Larijani says Iran will also hide its nuclear activities if there is a military action against it. He says Iran should not be expected to act transparently if other nations are threatening force.

He spoke Tuesday, three days before the Security Council deadline for Iran to stop enriching uranium.

The U.S. ambassador to the U.N. says the Council plans to consider a resolution to legally require Iran to comply with international nuclear demands.

But permanent Security Council members China and Russia have voiced opposition to such an action against Iran, arguing that the matter should be handled by the I.A.E.A.

Washington and the European Union are pressing for U.N. sanctions against Iran for refusing to halt its nuclear program. They say the program could lead to the production of nuclear weapons. Tehran insists its aims are peaceful.

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