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 carried out dozens of airstrikes across southern Lebanon today, one of the most intense bombardments in the country this year. The strikes came hours after Hezbollah’s leader vowed that “retribution will come” to Israel for the explosions of Hezbollah members’ hand-held devices.