An advisor to Iran's supreme leader Ayatollah Ali Khamenei has vowed retaliation for the bombing of the country's embassy in Syria, which was been blamed on Israel.

General Yahya Rahim Safavi, a former commander of Iran's elite army forces, warned that Israeli diplomatic missions could become targets for attack.

"The [anti-Israeli] resistance front is ready for all possible retaliation scenarios and no Israeli embassy worldwide is safe from it," Safavi was cited by state broadcaster Al-Alam as saying.

Despite his comments, many analysts in Iran consider an attack on Israeli embassies to be unlikely.

The airstrike on the Iranian embassy in Damascus killed two generals and five officers of the Iranian Revolutionary Guards.

Israel's military has not claimed responsibility for the strike but says the compound was not a civilian embassy.