Israel has attacked several Iranian nuclear facilities and military sites, and carried out assassinations of top military officials and nuclear scientists.

The attack has led to fears of a wider military conflict in the region, with Tehran promising a "harsh response”.

Iranian Supreme Leader Ali Khamenei warned that Israel faces a "bitter and painful” fate following the attack.

"By God’s will, the powerful hand of the Armed Forces of the Islamic Republic will not let it [Israel] go unpunished,” he said.

Israeli Prime Minister Benjamin Netanyahu said in a prerecorded message that the strikes early on Friday were aimed at hurting Iran’s nuclear infrastructure and ballistic missile factories.