TEHRAN — An influential Iranian lawmaker says his country has halted the production of enriched uranium up to 20 percent, a level that experts say is only a few technical steps from what is needed to produce a nuclear weapon.

The remarks by the lawmaker, Hossein Naqavi Hosseini, who is the deputy head of the national security and foreign policy committee in Parliament, were published on the Parliament’s official Web site, Icana, on Tuesday.

No other officials confirmed the news, but Mr. Naqavi Hosseini and his committee have recently visited nuclear sites and on Saturday were briefed by one of Iran’s main nuclear negotiators, Deputy Foreign Minister Abbas Araghchi.

Mr. Naqavi Hosseini is the first lawmaker of such stature to make such a statement. If his report is true, then Iran may be edging closer to accepting one of the main demands of world powers, that it suspend the enrichment of uranium, especially up to 20 percent.