The chief commander of Iran’s Revolutionary Guard has threatened to take revenge for the death of one of its senior officers who was killed in Syria Monday.

Hossein Salami said both the enemies and the Iranian nation must know that no killing will go unanswered.

However, he added that “the resistance front, which is a united front, takes revenge of the martyrs from the Zionists on a daily basis.”

The ‘resistance front’ is a term coined by the Islamic Republic to refer to its proxies and allies in the region.

“Of course, every martyr has a separate revenge, and these revenges will be taken at the right time and place. The levels of these measures will be different, but they will be done in time,” threatened Salami.

Government media in Iran carried a statement by the Revolutionary Guard November 22 saying that one of its senior officers has been killed in Syria.

The IRGC statement said Colonel Davoud Jafari, a senior aerospace commander lost his life in a roadside bomb blast on the outskirts of the Syrian capital, Damascus.

The IRGC said the incident took place on Monday, accusing Israel of executing the attack and pledging to respond to it. But it is not clear if Jafari died in a road side bomb or in one of frequent Israeli air strikes.

Iran has been deeply involved in the Syrian civil war for more than a decade, deploying tens of thousands of its own forces as well as hired Afghan, Iraqi and Pakistani Shiite fighters, who helped save Bashar al-Assad’s regime, with help from Russia.