Tensions are ratcheting up between Israel and Iran. 

On Tuesday, Iran warned Israel - through U.S. officials - that a recent airstrike in Syria had "crossed our red lines."

"We told the Americans that the leaders of the Zionist regime should await the consequences of their act," Iranian deputy foreign minister Hossein Amir Abdollahian said.

An Iranian general was killed Jan. 18, along with a Hezbollah commander and the son of the group's late military leader, Imad Moughniyeh

Then today, two Israeli soldiers were killed by a Hezbollah missile strike near the Israel-Lebanon border. 

Reuters reported:

In the biggest escalation since a 2006 war, the soldiers were killed when Hezbollah fired a missile at a convoy of Israeli military vehicles on the frontier with Lebanon.

The peacekeeper, serving with a U.N. monitoring force in southern Lebanon, was killed as Israel responded with air strikes and artillery fire, a U.N. spokesman and Spanish officials said.

Hezbollah said one of its brigades in the area had carried out the attack, which appeared to be in retaliation for a Jan. 18 Israeli air strike in southern Syria that killed several Hezbollah members and an Iranian general.

Tensions in the region, where the frontiers of Israel, Lebanon and Syria meet and militant groups opposed to Syrian President Bashar al-Assad are active, have been bubbling for months but have boiled over in the past 10 days.

The Israeli military confirmed the death of the soldiers, who were driving along a road next to the fence that marks the hilly frontier. Hospital officials said a further seven had been wounded, although none had life-threatening injuries.

Fox News military analyst Army Maj. Gen. Bob Scales  (Ret.) reacted this afternoon on "Happening Now," saying the Iranian regime's ultimate goal is to attack Israel. 

He said "everybody knows" Tehran is seeking to build a nuclear-armed missile that can hit Israel about 1,000 miles away. 

"I don't think anybody who has watched this going on for the last five months would deny that Iran eventually, sadly, will develop a nuclear weapon and a missile to deliver it," he said.

Scales said even if there's a deal between Iran and the West on its nuclear program, the Iranians will finish developing a nuclear weapon.

He said Iran, not ISIS, is the "greatest threat to the next World War and American security."

"If Iran strikes Israel, and I believe they want to do that more than anything, I believe the United States will be forced to do something militarily against Iran," said Scales.

Watch Scales' analysis above, and John Huddy's report on the Hezbollah attack below.