From CNN

Hezbollah on Monday fired two projectiles toward Israeli-occupied territory, responding to repeated Israeli strikes that have hit Lebanon daily since Thursday, the day after the ceasefire came into force.

The projectiles landed in an open area and no one was injured, according to the Israeli military. It did not specify the type of projectile fired.

Hours later, Israel’s military said it began striking “Hezbollah terrorists, dozens of launchers, and terrorist infrastructure throughout Lebanon,” after Prime Minister Benjamin Netanyahu vowed to retaliate, calling Hezbollah’s attack “a serious violation of the ceasefire.”

Lebanon "attacked" in response to Israel's attacks, and it fired warning shots into an open field. Then Israel started hitting targets.

Israel is the aggressor, as always.