Jerusalem, Nov. 24 -- An Israeli airstrike on Beirut's southern suburbs killed senior Hezbollah commander Haytham Ali Al-Tabtabi on Sunday, the Israeli military and the Lebanese group said, a high-profile assassination that further strains a year-old ceasefire.

Hezbollah confirmed Al-Tabtabi's death in what it termed a "treacherous Israeli attack" on the Haret Hreik district, stating he died "in sacrifice for Lebanon and its people." The group described him as one of its most prominent commanders, a central figure in its military operations against Israel since the organization's early years.

The Israeli military stated its air force struck the suburb based on intelligence from the Military Intelligence Directorate, identifying Al-Tabtabi...