U.N. Secretary-General António Guterres has urged for a return to diplomacy and “maximum efforts to prevent an all-out regional war” after Israel bombed Iranian military facilities and air defense systems Saturday. The strikes included a site linked to Iran’s ballistic missile program. Iran said four soldiers were killed. Israel also struck air defense batteries and radars in Syria and Iraq. Iranian President Masoud Pezeshkian said Iran would take “an appropriate response” to the attack, but he reiterated that Iran does not seek a wider war. Israel’s attack came about four weeks after Iran launched a missile attack on Israeli military sites in response to Israel’s mounting assault on Lebanon and Israel’s assassination of Hezbollah and Hamas leaders.