U.S. officials are anticipating that the fighting between Israel and Hezbollah will increase significantly in the coming days, potentially sparking an all-out war between the two sides.

American officials have long said that both Israel and Hezbollah want to avoid war. But tensions are at an all-time high following Israel’s consecutive attacks on Hezbollah in Lebanon this week. The latest analysis inside the Biden administration is that it will be difficult for both sides to de-escalate, according to two senior U.S. officials familiar with the conversations.