Israeli missile hits Iran, US officials say, as blasts heard.

Israel has not confirmed it was responsible but had vowed to respond to a massive Iranian missile and drone attack on its territory last weekend.

Iranian officials and media claimed the attack did not inflict any damage.

While US officials confirmed the strike happened to the BBC's partner station CBS News, the response from Tehran has been muted and mild.

Some officials have denied outright that it even took place at all, and one mocked it as "a failed attack" involving just a "few quadcopters".

While it is not possible to independently verify the damage it may have caused, the strike appears to have been limited in its scope. No casualties have been reported.

It appears to be a carefully calibrated response by Israel to Iran's missile attack last weekend, aimed at balancing the demands of those in Israel demanding a tough response and the worldwide appeals for calm.

Iran had been on high alert after Israel said it would respond to the unprecedented Iranian attack, which saw more than 300 drones and missiles fired towards Israel - most of which were shot down.

That attack was in response to a presumed Israeli strike on Iran's consulate in the Syrian capital Damascus, which killed senior military commanders.

World leaders have been urging the two Middle East rivals to deescalate rising tensions in recent days, though Israel had repeatedly signalled it intended to retaliate in some form.

Several Iranian nuclear facilities are based in Isfahan, which Iran say are used for purely peaceful purposes, though Israel and Western powers have long suspected Tehran of secretly developing nuclear weapons.

Both Iranian media and the International Atomic Energy Agency (IAEA) said no nuclear sites were damaged in this strike.

Israel appears to have heeded appeals from allies not to risk further escalation with a large response, but sought to send a message that it can strike close to Iran's nuclear programme and that next time it could be with much greater force.