Some 100 Iranian lawmakers have introduced a bill that would require the government to increase uranium enrichment to 60 percent if any new international sanctions are imposed on the country.
State media reported on December 25 that it is unclear when the legislature will consider the bill.
The proposed measure is being seen as retaliation for a bill introduced last week in the U.S. Senate that would authorize new sanctions if Iran fails to abide by a temporary agreement over its disputed nuclear program signed in Geneva last month.
Under that deal between Iran and the so-called P5+1 group of countries -- Britain, China, France, Russia, the United States, and Germany -- Iran agreed to limit enrichment to 5 percent and neutralize its stockpile of 20 percent enriched uranium in exchange for an easing of some sanctions.
Based on reporting by AP and Reuters