US military strikes on three of Iran’s nuclear facilities did not destroy the country’s bomb programme and only set it back by months, an intelligence report has found.

The strikes on the heavily fortified enrichment facilities at Fordow and Natanz did not do as much damage as US officials hoped, according to an initial assessment.

The early findings, produced by the Pentagon, found much of Iran’s stockpile of enriched uranium was moved before the strike.

The bombings sealed off the entrances of the target nuclear facilities and did not succeed in collapsing the underground buildings, the Defence Intelligence Agency (DIA) found.