▁the ▁UN ▁International ▁At omic ▁Energy ▁Agency ▁( IA E A ). ▁These ▁reports ▁have ▁not ▁yet ▁been ▁officially ▁confirmed ▁by ▁the ▁I AE A ▁( as ▁of ▁ 1 ▁June ▁ 2 0 0 6 ). ▁ ▁On ▁ 3 1 ▁July ▁ 2 0 0 6 , ▁the ▁United ▁Nations ▁Security ▁Council ▁passed ▁a ▁resolution ▁demand ing ▁that ▁Iran ▁susp end ▁its ▁u ran ium ▁en rich ment ▁activities . ▁ ▁In ▁late ▁ 2 0 0 6 , ▁" New ▁traces ▁of ▁plut on ium ▁and ▁en rich ed ▁u ran ium – ▁potential ▁material ▁for ▁atomic ▁war head s – ▁have ▁been ▁found ▁[ by ▁the ▁I AE A ] ▁in ▁a ▁nuclear ▁waste ▁facility ▁in ▁Iran ." ▁However , ▁" A ▁senior ▁U . N . ▁official ▁who ▁was ▁familiar ▁with ▁the ▁report ▁ca ution ed ▁against ▁reading ▁too ▁much ▁into ▁the ▁find ings ▁of ▁traces ▁of ▁highly ▁en rich ed ▁u ran ium ▁and ▁plut on ium , ▁saying ▁Iran ▁had ▁explained ▁both ▁and ▁they ▁could ▁pla us ibly ▁be ▁class ified ▁as ▁by products ▁of ▁peace ful ▁nuclear ▁activities ." ▁In ▁ 2 0 0 7 ▁these ▁traces ▁were ▁determined ▁to ▁have ▁come ▁from ▁le aking ▁used ▁highly ▁en rich ed ▁u ran ium ▁fuel ▁from ▁the ▁Te h ran ▁Research ▁Re actor , ▁which ▁the ▁U . S . ▁supplied ▁to ▁Iran ▁in ▁ 1 9 6 7 , ▁and ▁the ▁matter ▁was ▁closed . ▁ ▁In ▁July ▁ 2 0 0 7 ▁the ▁I