The militant group said 16 of its members were killed in Friday’s attack in Beirut, which Lebanon’s health minister said left a total of 31 people dead.

Israel has claimed the death of a senior Hezbollah military official after a rare Israeli airstrike in Beirut killed at least 31 people and wounded dozens more, shortly after Hezbollah pounded northern Israel with 140 rockets.

Israel is attempting a risky strategy, increasing the intensity of its attacks in an attempt to force Hezbollah to back down, while raising the chances of an aggressive response that devolves into a land war.