JERUSALEM (AP) — Israel says Iran has launched missiles at it in the first such bombardment since a fragile ceasefire took effect in early April, complicating mediation efforts for a deal to end the war.

Tehran had warned of retaliation after Israel on Sunday struck Beirut’s southern suburbs in defiance of Washington’s request days ago to stand down. Israel called it retaliation for the Iranian-backed Hezbollah firing at northern Israel earlier in the day.

Israel’s attack on Beirut came a few days after the Lebanese and Israeli governments agreed to a ceasefire in U.S.-hosted talks, though Hezbollah rejected the deal. The strike on a residential building killed two people and wounded 20, Lebanon’s health ministry said.