Supreme Leader Ali Khamenei did not explicitly say an attack would originate from Iran, adding to speculation Tehran plans to retaliate from neighboring Iraq.

Threat by supreme leader raises concerns of wider regional conflict just ahead of the American presidential election this Tuesday.

Ayatollah Ali Khamenei spoke as Iranian officials intensified threats of another strike against Israel, following its October 26 attack on Iran, which targeted military bases and other locations, resulting in at least five deaths.