Israeli Prime Minister Benjamin Netanyahu warned yesterday that Iran was just six to seven months away from the brink of being able to build a nuclear bomb.

He demanded President Barack Obama set a “red line” for Tehran in what could deepen the worst US-Israeli rift in decades.

Taking to the TV airwaves to make his case directly to the American public, Netanyahu said that by mid-2013 Iran would be “90 per cent of the way” towards enough enriched uranium for a weapon.

He again urged the US to spell out limits that Tehran must not cross if it is to avoid military action – something Obama has refused to do.

“You have to place that red line before them now, before it’s too late,” Netanyahu said on NBC’s Meet the Press programme, adding that such a US move could reduce the chances of having to attack Iran’s nuclear sites.

The unusually public dispute between close allies – coupled with Obama’s decision not to meet Netanyahu later this month – has exposed a gaping US-Israeli divide and stepped up pressure on the US leader in the final stretch of a tight presidential election campaign.

It was the clearest marker Netanyahu has laid down so far on why he has become so strident in his push for Washington to confront Tehran with a strict ultimatum.

At the same time, his approach could stoke further tensions with Obama, with whom he has had a notoriously testy relationship.

US officials say Iran has yet to decide on a nuclear “breakout” – a final rush to assemble components for a bomb – and they express high confidence it is still at least a year away from the capacity to build one if it wanted to. This contrasts with Netanyahu’s timetable, although he stopped short of saying Iran had decided to manufacture a weapon.

Netanyahu showed no signs of backing off and equated the danger of a nuclear-armed Iran with the Islamist fury that fuelled attacks on US embassies across the Muslim world last week and shocked many Americans.

“It’s the same fanaticism you see storming your embassies today.

“You want these fanatics to have nuclear weapons?” Netanyahu asked in the NBC interview, in a clear emotional appeal to Americans still reeling from the angry protests sparked by a film that mocked the Prophet Mohammad.

There have been no accusations, however, of any Iranian role stoking violence that hit Middle Eastern and African capitals.

Speaking via satellite from Jerusalem, Netanyahu argued that a credible US ultimatum was needed to curb Iran, which denies it is seeking a nuclear bomb.

Sign up to our free newsletters

Get the best updates straight to your inbox:
Please select at least one mailing list.

You can unsubscribe at any time by clicking the link in the footer of our emails. We use Mailchimp as our marketing platform. By subscribing, you acknowledge that your information will be transferred to Mailchimp for processing.