Israel launched a wave of airstrikes across southern Lebanon early Sunday in what it said was a preemptive strike on Hezbollah. The militant group responded that it had launched hundreds of rockets and drones to avenge the killing of one of its top commanders last month.

Meanwhile, Egypt on Sunday is hosting high-level talks aimed at brokering a cease-fire in the 10-month-old Israel-Hamas war in Gaza, which diplomats hope will tamp down regional tensions.