Hezbollah was reeling Saturday from an Israeli airstrike that killed two of its senior figures and dozens of other people, intensifying fears of all-out war in the Middle East in the wake of the deadly attacks on the group’s communication devices.

Israel has launched a rare airstrike that killed a senior Hezbollah military official in a densely populated southern Beirut neighborhood.

At least 31 people died in an Israeli airstrike on a Beirut suburb on Friday, the Lebanese health ministry said on Saturday, including three children and seven women, in the deadliest strike in a year of conflict between Hezbollah and Israel.