Israeli Prime Minister Benjamin Netanyahu approved “in principle” the ceasefire agreement with Hezbollah, supported by the United States, during a security consultation with Israeli officials on Sunday evening, a source familiar with the matter told CNN.

Israel still has reservations about some details of the agreement, which were expected to be sent to the Lebanese government on Monday, the same source said. At the same time, the Israeli Prime Minister is reportedly working with his advisers on how to present the agreement publicly, which also needs to be approved by the Israeli cabinet, a step that has not yet been taken.

Sources familiar with the negotiations emphasized that the talks appear to be progressing positively, but also acknowledged that as Israel and Hezbollah continue exchanging fire, one misstep could undo everything and bring the situation back to square one.

In recent days, Hezbollah has been considering the U.S.-backed proposal for a 60-day halt in hostilities, which, according to officials, could serve as the basis for a lasting ceasefire.