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.

Israeli forces on Saturday said they had killed several "terrorists" trying to cross from Lebanon amid heightened tensions and after repeated cross-border shelling.

The Israeli army said Saturday it was "very sorry" for the death of a Reuters journalist killed when Israel fired a missile, reportedly from an Apache helicopter, at a group of journalists who were covering the events on the Lebanese border.

"We are very sorry for the journalist's death," military spokesman Richard Hecht told reporters when asked about the killing of Reuters videographer Issam Abdallah on Friday.

Iranian Foreign Minister Hossein Amir-Abdollahian said Saturday that anti-Israel militant groups in the region are “fully ready” to respond to any move by Israel.

The minister spoke in Beirut at the end of a tour that took him to Syria, Iraq and Lebanon, where Iran enjoys wide influence and where tens of thousands of Iran-backed fighters are deployed.

A Reuters journalist of the Lebanese nationality was killed when an Israeli shell landed in a gathering of international journalists covering clashes on the border in south Lebanon on Friday. Six other journalists were wounded.

"We are deeply saddened to learn that our videographer, Issam Abdallah, has been killed," Reuters said, adding that, he "was part of a Reuters crew in southern Lebanon."

Israel shelled a border region in southern Lebanon on Friday, two Lebanese security sources said, after a blast occurred on the border fence, according to the Israeli army.

One of the security sources said the shelling followed an infiltration attempt from the Lebanese side of the border, while the Israeli army said it was responding to a blast that caused "light damage" to the border barrier.