The U.N. humanitarian chief voiced alarm Wednesday at the prospect of Israel's war against Hamas in Gaza spreading to Lebanon, warning that it was "potentially apocalyptic."

"I see it as the flashpoint... It's potentially apocalyptic," Martin Griffiths, whose term finishes at the end of the month, told reporters in Geneva.

Caretaker Prime Minister Najib Mikati said Wednesday that efforts should be exerted to prevent Lebanon from being turned into “an arena for armed conflicts starting from the south.”

“The relevant U.N. resolutions must be implemented in order to put an end to Israel’s expansionist ambitions, and accordingly not linking Lebanon’s stability and interests to extremely complicated conflicts and endless wars,” Mikati added, during a joint press conference in Beirut with the Vatican’s Secretary of State, Cardinal Pietro Parolin.

Vatican Secretary of State Pietro Parolin on Wednesday urged warring parties in the Middle East to accept "peace proposals," saying the region including Lebanon "doesn't need war."

"The Middle East is going through a critical moment," Parolin told a press conference in Beirut during a days-long visit to Lebanon.

Caretaker Foreign Minister Abdallah Bou Habib on Wednesday traveled to Brussels for talks with European Union officials.

Bou Habib will then head to the United States for talks with U.S. officials in Washington and U.N. officials in New York. The minister will also visit Canada to meet with his Canadian counterpart.

The Vatican’s Secretary of State, Cardinal Pietro Parolin, met Wednesday in Ain el-Tineh with Speaker Nabih Berri after which he said that “the solution for the presidential crisis begins from this headquarters.”

“The Christian parties certainly bear responsibility, but they are not alone in power and others must shoulder their responsibilities,” Parolin added.

Turkish President Recep Tayyip Erdogan on Wednesday accused Western powers of backing what he said were Israeli plans to attack Lebanon and "spread war" throughout the region.

"Israel is now setting its sights on Lebanon and we see that Western powers behind the scenes are patting Israel on the back and even supporting them," he told lawmakers from his ruling AKP party.

A spokesperson for the United Nations peacekeeping force deployed in south Lebanon along the border with Israel said three of their contractors were wounded when gunfire hit their vehicle.

“Fortunately, there were no serious injuries,” deputy spokesperson for UNIFIL Kandice Ardiel said Tuesday.

Israeli artillery shelled Wednesday Kfarshouba and Wadi Hamoul in south Lebanon, while warplanes raided Aita al-Shaab, al-Khiam and al-Dhayra and a drone struck a power line in al-Taybeh.

Israeli warplanes also struck Shebaa overnight.

Canada has urged its citizens in Lebanon to leave "while they can," warning of the risk of escalating violence between Israel and Hezbollah in the region.

Foreign Minister Melanie Joly in a statement Tuesday called for Canadians to depart while commercial flights remain in operation.

German Foreign Minister Annalena Baerbock has cautioned that "miscalculation" could trigger all-out war between Israel and Hezbollah in Lebanon, urging the need for "extreme restraint" as tensions soar.

Israel and Hezbollah, a Hamas ally, have traded near-daily cross-border fire since the Palestinian militant group's October 7 attack on Israel sparked war in the Gaza Strip.