'The U.N. atomic agency found traces of highly enriched uranium at an Iranian site linked to the country's defense ministry, diplomats said Friday, adding to concerns that Tehran was hiding activities aimed at making nuclear arms.
The diplomats, who demanded anonymity in exchange for revealing the confidential information, said the findings were preliminary and still had to be confirmed through other lab tests. But they said the density of enrichment appeared to be close to or above the level used to make nuclear warheads.'
