Hezbollah’s deadly attack against an army base deep inside Israeli territory presents a major headache for Israel as it continues to struggle to defuse the threat posed by the group.

Hezbollah said the drone attack was in retaliation for two Israeli strikes in Beirut on Thursday that killed 22 people.

The U.N. Security Council expressed “strong concern” as Israel has fired on and wounded U.N. peacekeepers in southern Lebanon during intensified fighting, reiterating its support for their role in supporting security in the region.

The Security Council also called for the full implementation of its resolution 1701, which was adopted in 2006 with the aim of keeping peace on the border between Lebanon and Isra

Israel expanded its targets in its war with Hezbollah militants in Lebanon on Monday, killing at least 21 people in an airstrike in the north, health officials said, while millions of Israelis took shelter from projectiles fired back across the border.