According to state media, a top Iranian military official warned on Saturday of a “severe price” for aggressors following a revelation of US and Israeli plans for probable military drills to prepare for strikes against Iran’s nuclear installations if diplomacy fails.

“Providing circumstances for military commanders to test Iranian missiles against genuine targets would pay the aggressors a hefty price,” Nournews, a news outlet linked with Iran’s main security organization, tweeted, quoting an anonymous military officer.

A senior U.S. official told Reuters on Thursday that U.S. and Israeli defense chiefs were expected to discuss possible military exercises that would prepare for a worst-case scenario to destroy Iran’s nuclear facilities should diplomacy fail and if their nations’ leaders request it.