Israel's National Security Council chief Tzachi Hanegbi said Prime Minister Benjamin Netanyahu would receive support to strike Iran's nuclear facilities if all routes were exhausted.
Hanegbi added that Iran's enrichment of uranium to 90% is a red line for the whole world, and pointed out that Israel did not waste time and succeeded in delaying the Iranian nuclear project.
The Israeli official said Washington believed a diplomatic solution was possible to dissuade Iran from its nuclear project, but Israel questioned that.
IDF Chief of Staff Aviv Kochavi said Iran is using Syria as a potential war zone with his country, saying, "We have the ability to strike Iran, and we are not indifferent to what Iran is trying to build around us." Lebanon's Hizbullah is "strongly deterred from waging an all-out war against us, and we are well prepared on the northern front", he said.
Hezbollah manoeuvre in southern Lebanon simulated the kidnapping of soldiers and the storming of settlements (French)
Israeli Defense Minister Yoav Galant said earlier that Iran was fighting a war of attrition against Israel with its close proxies across the border, and stressed that Israel had doubled its attacks in Syria to prevent Iran's attempts to entrench itself militarily there.
Gallant threatened that all options must be on the table to prevent Iran from acquiring a nuclear weapon, while warning Tehran of the consequences of increasing uranium enrichment to 90 percent.
Aharon Halifa, head of Israel's military intelligence division, said Lebanese Hizbullah leader Hassan Nasrallah was very close to making a mistake that would lead the deteriorating situation in the region to a major war.
Halifa added, in an intervention at a conference for the security study in the city of Herzliya, that allowing Syrian President Bashar al-Assad to use his territory to launch marches towards Israel makes the possibility of this war greater, calling on his country to prepare for it.
The stances came a day after Hezbollah military exercises in southern Lebanon simulated the abduction of soldiers and the storming of settlements.
On the other hand, an Iranian official told Al Jazeera that any military attack would be met with a broad and unprecedented response.