An airstrike targeted a senior Hezbollah leader in Beirut's southern suburbs on Thursday afternoon, with fighting between Israel and the Iran-backed terror group showing little sign of slowing as an international bid to secure a ceasefire appeared to fall apart. The attack marked at least the fourth time Israel has targeted the group's top commanders in recent days, including a Tuesday strike on rocket and missile chief Ibrahim Qubaisi and a Friday attack on Ibrahim Aqil, the head of Hezbollah's military operations. Both were killed. Thursday's strike came after Israel said its warplanes had pounded targets across southern Lebanon and on the Syria-Lebanon border, and as Hezbollah fired dozens of projectiles at northern Israeli cities.