Iran threatened Israel on Monday after an Israeli unit killed six Iranian agents during a raid on a Hezbollah terrorist cell.

Iran promised a “crushing response” against the Jewish nation.

“The experience of the past shows that the resistance current will give a crushing response to the Zionist regime’s terrorist moves with revolutionary determination and in due time and place,” Ali Shamkhani, the secretary of Iran’s Supreme National Security Council (SNSC), told reporters.

The incident comes a week after Iranian officials said they were operating missile sites in Syria and possibly control a nuclear facility.

“If the highest level of Hezbollah commanders were in the Golan Heights and the high level of Iranians, it means that their idea, [what] they’re planning could be a kind of operation, an act against Israel on a high level,” Major General Eyal Ben Reuven of the IDF said during a conference call Monday organized by the Israel Project (TIP). “It’s significant, the high level of this meeting, of this reconnaissance of the Iranians and Hezbollah.”

“It says something about what they plan, what kind of operation they planned,” he added. “If Israel has intelligence that says there is a kind of operation on the way to act against Israel, I think Israel would have a legitimate [reason] to do all we can to prevent it.”

Hezbollah has said they are preparing for war in northern Israel.