Israel is not interested in having a war on its northern frontier with Lebanon, Defense Minister Yoav Gallant said as tensions mount on the Lebanese-Israeli border.

Hezbollah and Israel exchanged deadly cross-border fire Sunday, with the Iran-backed, Lebanon-based group claiming responsibility for strikes that Israel said killed a civilian.

The exchanges -- and a rocket that hit a U.N. peacekeeping base -- further raised tensions on Israel's northern border, as it targets Hamas militants in the Gaza Strip to the south.

Cross-border clashes between armed factions in Lebanon and Israel intensified Sunday, with Hezbollah firing rockets and Israeli forces responding with shelling.

The Israeli army also reported a shooting at one of its border posts. The fighting has killed at least one person on the Israeli side and wounded several on both sides of the border.

A rocket hit the headquarters of the U.N. peacekeeping mission in southern Lebanon in the coastal town of Naqoura as clashes between Hezbollah and its allies and the Israeli military escalated Sunday.

The U.N. mission said no one was hurt even though the peacekeepers were not in shelters. It did not specify where the rocket came from but expressed disappointment saying that despite the mission's efforts to get the sides "to de-escalate the situation,” the violence continues.

Hezbollah staged an attack on Sunday morning against Israeli military posts on Lebanon's border, drawing Israeli retaliatory fire.

Hezbollah said it shelled Israeli military positions in the northern Israeli border settlement of Shtula. The group said in a statement the attack was in retaliation for Israeli shelling that killed Reuters videographer Issam Abdallah on Friday and two Lebanese civilians on Saturday.

The German government on Sunday urged its nationals not to travel to Israel, the Palestinian territories or Lebanon because of "an escalation of violence" following the Hamas-Israel war.

Hamas claimed responsibility Sunday for two infiltrations from Lebanon to Israel that killed three of its fighters, as war rages between the Gaza-based militants and Israel.

The Ezzedine al-Qassam Brigades, Hamas' armed wing, said its members were "able... to blow up the border fence and... go forth inside occupied Palestine," clashing with "the enemy," whose planes targeted the fighters, killing three on Saturday.

A Reuters videographer killed in Israeli shelling of southern Lebanon was laid to rest in his hometown Saturday in a funeral procession attended by hundreds of people.

Draped in a Lebanese flag, Issam Abdallah’s body was carried on a stretcher through the streets of the southern town of Khiam, from his family’s home to the local cemetery.

Two Lebanese civilians were killed in Israeli shelling of the southern village of Shebaa on Saturday, its mayor told AFP, as border tensions rise over Israel's war with Hamas.

"A man and his wife have been killed in their home by Israeli shelling," mayor Mohammad Harb told AFP.

Hezbollah on Saturday attacked four Israeli military posts in the occupied Shebaa Farms and Kfarshouba Hills.

Israel immediately responded by shelling nearby border areas.