Israel’s defense minister warned Saturday that “Tehran will burn” if Iran continues firing missiles, as the two countries traded blows a day after Israel launched a blistering surprise attack on Iranian nuclear and military sites, killing several top generals.

Israel’s military said the strikes also killed nine senior scientists and experts involved in Iran’s nuclear program. Iran’s U.N. ambassador said 78 people were killed and more than 320 wounded.

Iran retaliated by launching waves of drones and ballistic missiles at Israel, where explosions lit the night skies over Jerusalem and Tel Aviv and shook buildings. The Israeli military urged civilians, already rattled by 20 months of war in Gaza sparked by Hamas’ Oct. 7 attack, to head to shelter for hours. Health officials said three people were killed and dozens wounded.