Israel unilaterally conducted a significant military operation targeting Iran’s nuclear program on Thursday, hours after President Donald Trump cautioned Israel against one in favor of continuing their diplomatic efforts.

Details of the damage Israel inflicted are still being assessed, though an Israel Defense Forces spokesperson called it a “preemptive, precise, combined offensive” and warned Israeli civilians to be prepared for a retaliatory attack.

“Following the State of Israel’s preemptive strike against Iran, a missile and drone attack against the state of Israel and its civilian population is expected in the immediate future,” Israel Katz, the defense minister, said.