The Iranian Revolutionary Guards said on Saturday Iran will strike Israel's nuclear facilities if Tel Aviv attacks the Islamic state, state television reported.
"If the Zionist Regime (Israel) attacks Iran, we will surely strike its nuclear facilities with our missile capabilities," Mohammad Ali Jafari, Guards commander-in-chief, told Iran's Arabic language al-Alam television.
Jafari said Israel was entirely within the reach of Iran.
The United States, Israel and their Western allies fear that Iran is enriching uranium with the aim of producing nuclear weapons and have not ruled out military action if diplomacy fails to resolve the row.
Iran says it is pursuing only a nuclear power generation programme.
If Iran develops nuclear capabilities it will start an arms race in the Middle East that would threaten the world, said Avigdor Lieberman, Israel's foreign minister.