U.N. peacekeepers in Lebanon urged immediate de-escalation as hostilities rumbled on at the Lebanese-Israeli border on Friday, following Israel's most intense airstrikes in nearly a year of conflict with the Iran-backed Hezbollah.

Israel launched a wave of airstrikes against Hezbollah targets in Lebanon Thursday, as the militant group’s leader said two days of debilitating attacks on its members amounted to a declaration of war.

The continued attacks from Israel and Hezbollah have increasingly raised the concerns of a full-scale war breaking out in the region, while the one on Gaza is already underway.