Israeli forces carried out several new drone and artillery strikes in Lebanon on Tuesday, including a deadly strike that the Health Ministry and state media said killed a shepherd, further shaking a tenuous ceasefire meant to end more than a year of fighting with Hezbollah.

As tit-for-tat strikes strain a ceasefire between Israel and Hezbollah less than a week since it went into effect, Israel’s defense minister on Tuesday threatened to directly target the Lebanese state should the agreement fall apart.