Iran stopped its nuclear weapons program in 2003 but continues to enrich uranium and could have a weapon within a handful of years, a U.S. government report said Monday.

"We judge with high confidence that in fall 2003, Tehran halted its nuclear weapons program," said the latest National Intelligence Estimate (NIE), released by the White House.

"We also assess with moderate to high confidence that Tehran, at a minimum, is keeping open the option to develop nuclear weapons."

The report says it is moderately confident Iran is technologically capable of producing a nuclear weapon "during the 2010-2015 time frame."

If true, the findings suggest Iran is susceptible to diplomatic pressure from the international community, according to analysts.

The United Nations Security Council has imposed two rounds of sanctions on Iran for failing to meet its demands regarding nuclear activity. Washington is pressing for further sanctions.

With files from the Associated Press