Iran could hit U.S. bases in the Middle East in response to any Israeli strike on its nuclear facilities even if American forces played no role in the attack, the leader of Lebanon's Iranian-backed militant group Hezbollah said on Monday.


"A decision has been taken to respond and the response will be very great," Hezbollah Secretary-General Sayyed Hassan Nasrallah said in an interview with the Beirut-based Al Mayadeen television.

"The response will not be just inside the Israeli entity - American bases in the whole region could be Iranian targets," he said, citing information he said was from Iranian officials. "If Israel targets Iran, America bears responsibility."

Heightened Israeli rhetoric about Tehran's nuclear facilities, which the West says could be part of a weapons program, has stoked speculation that it may attack Iran before U.S. elections in November.

Prime Minister Benjamin Netanyahu urged world powers on Sunday to set a "clear red line" to convince Iran they would prevent it from obtaining nuclear arms.