Israel’s army said it hit a Hezbollah drone storage facility in Dahiyeh, which it called a militant stronghold.

An already fragile ceasefire between Israel and the Lebanese militant group Hezbollah appeared to be on shakier ground after rockets fired from Lebanon into northern Israel triggered Israeli airstrikes in the suburbs of Beirut.

Israel launched an airstrike on Beirut for the first time since a U.S.-backed cease-fire took effect in November, amid growing frustrations among some American officials about the Lebanese government’s slow progress in disarming Hezbollah in the country’s south.