US Defense Secretary Lloyd Austin warned Friday of “devastating” consequences if Israel engages in an all-out war with Hezbollah, telling CNN in an exclusive interview that casualties would “equal or exceed” what has taken place in Gaza.

Israel is firing strikes into Lebanon as the conflict in the Middle East intensifies. Israel believes it has eliminated around 30 top Hezbollah leaders over the last several weeks, including Hezbollah leader Hassan Nasrallah, who was killed in an Israeli airstrike in Beirut on Friday, U.S. and Israeli officials said.