Israeli strikes killed at least nine people in southern Lebanon, Lebanese authorities said Monday, the deadliest day since a ceasefire brokered by the United States and France came into effect last week.

Israel hits Lebanon with its largest wave of airstrikes since agreeing to a ceasefire with Hezbollah, as both sides accuse each other of violations.

Both sides have accused each other of violating the deal; Hezbollah fired into Israel for the first time since the truce took effect, and Israel responded with airstrikes.

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.

The Israeli military says Hezbollah has fired into a disputed border zone, its first attack since a ceasefire took hold last week. It comes after Hezbollah accused Israel of violating the truce with airstrikes and shelling in Lebanon.

The Israeli military said on Monday it struck dozens of targets throughout Lebanon, shortly after Hezbollah accused Israel of violating a ceasefire agreement and fired missiles on an Israeli military position in the disputed Shebaa Farms area.

Israel and Hezbollah traded new attacks Monday, stoking concerns their fragile cease-fire could unravel less than one week after going into effect, but the Biden administration insists the deal is holding despite the violence.

Amidst a backdrop of uneasy peace, the skies over Shebaa Farms witness a fresh volley. The delicate truce between Hezbollah and Israel teeters on the brink.

Despite the ceasefire agreement between Israel and Hezbollah, the back-and-forth violence doesn't appear to be going away. Both sides say the other is violating the deal. Matthew Levitt, a Middle East policy expert with the Washington Institute,