Although Trump said he would “immediately impose” a slate of additional new sanctions on the Iranian regime, he declined to announce military retaliation and insisted the U.S. “is ready to embrace peace with all who seek it.”

Hours earlier, however, Iran’s Supreme Leader Ayatollah Ali Khamenei warned in a speech in the holy city of Qom that while the U.S. was “slapped” in the missile strike, “such military actions are not enough.”

Iran’s Islamist government fired more than a dozen ballistic missiles earlier this week targeting at least two Iraqi air bases in Ain al-Asad and Irbil that were “hosting U.S. military and coalition personnel,” according to the Pentagon.

The salvo followed Trump’s order last week to kill Tehran’s top military commander, Iranian Maj. Gen. Qassem Soleimani, in an overnight U.S. drone strike near Baghdad’s international airport.

In claiming responsibility for the missile strike, Iran’s Islamic Revolutionary Guard Corps warned the U.S. and its allies not to counterattack, vowing even more escalation in the future. In a statement on Iranian state media, the IRGC also threatened Israel and called on Americans to bring U.S. troops back home.

“We are warning all American allies, who gave their bases to its terrorist army, that any territory that is the starting point of aggressive acts against Iran will be targeted,” it said. The IRGC promised “more painful and crushing responses” if America, “the Great Satan,” fought back.

In another Tasnim report published Thursday, deputy IRGC head Ali Fadavi boasted about the act of retribution for Soleimani’s death, asserting that U.S. forces “couldn't do a damn thing” in response.