Their joint statement is criticalof Teheran's decision to enrich to the 20-percent level, saying itrepresents "a further step toward a capability to produce highlyenriched uranium."
The confidential joint statement was shared Tuesday with The Associated Press.
Uranium enriched up to 90 percent is used toarm nuclear warheads. Iran says its enrichment program is peaceful, butthe international community fears it is a cover for plans to developsuch weapons.