S enior Israeli officials are acknowledging that some enriched uranium may have survived the powerful U.S. strikes on Iran's key nuclear sites last month.

Initially US President Donald Trump claimed the operation was a total success, but officials on both sides of the Atlantic are now acknowledging that significant quantities of enriched uranium may have withstood the bombardment.

Israel believes a U.S. strike buried the enriched uranium under an Iranian facility, the official told reporters in Washington.