At least three Israeli strikes hit Beirut's southern suburbs on Monday, hours after the Israeli army issued a warning for residents of the area to evacuate.

Live broadcasts showed clouds of smoke over the southern suburbs, which are considered a Hezbollah stronghold and have not been hit since Friday night.

A series of strikes hit Beirut's southern suburbs on Monday and early Tuesday, the first attack on the Hezbollah stronghold in days, as Israel's military said it captured two members of the Iran-backed group in southern Lebanon.

In a statement on Monday, the Israeli army said that "during an activity to locate weapons in southern Lebanon, (Israeli) troops identified several armed Hezbollah Radwan Force terrorists who were planning to fire an anti-tank missile", referring to the group's commando force.

The U.N. peacekeeping force in Lebanon (UNIFIL) announced Monday that its headquarters in Naqoura had been hit by a projectile, probably launched by a "non-state actor", after Hezbollah declared it had targeted Israeli forces in the same town.

Since Saturday, the coastal town in Lebanon's far south on the border with Israel, has been one of the flashpoints between Hezbollah and the Israeli army.

The Israeli military on Monday struck a bridge linking southern Lebanon with the eastern Bekaa region, state media reported, after warning it would hit the crossing.

The strike is part of a series of attacks on bridges over Lebanon's Litani River, located around 30 kilometers north of Israel, including the key Qasmiyeh bridge on Sunday.

As it engages in heated battles with Hezbollah in a number of Lebanese border villages, Israel has bombed at least five of the six principal bridges across a river dividing the country's south.

Military experts agree the strikes are an attempt to cut off the region south of the Litani river from the rest of Lebanon, but are divided on whether the move will change the course of the fighting.

Mayors of several towns in southern Lebanon said the Israeli military had ordered them to force out the displaced who had escaped their Shia-majority towns, considered Hezbollah strongholds, during the war with Israel.

Since Lebanon was pulled into the Middle East war following Iran-backed Hezbollah's March 2 rocket fire on Israel, more than a million people have been displaced by Israeli strikes.

An Israeli strike on Hazmieh east of Beirut killed at least one person, Lebanon's health ministry said, the second strike on the residential Christian area in the ongoing Israel-Hezbollah war.

The Israeli military said around the same time that it had "struck an IRGC Quds Force terrorist in Beirut", referring to the foreign operations arm of Iran's Revolutionary Guards.

Hezbollah targeted Monday Israeli troops and bases in northern Israel and in southern Lebanon with attack drones, rockets and advanced missiles.

The group said in separate statements that it targeted troops near Alma al Shaab, al-Taybeh, Markaba, Dhayra, and Maroun al-Ras with attack drones, rockets and advanced missiles. It also targeted several times al-Manara, Metula and the Zari'it barracks in north Israel, and troops inside Lebanon near al-Naqoura's municipality.

President Joseph Aoun met Monday with Speaker Nabih Berri and Prime Minister Nawaf Salam.

The talks stressed the importance of "national unity and solidarity", as Berri said he is "reassured by the presence of the president."

A strike on a bridge Monday in the southern village of Qaaqaaiyet al-Jisr cut a main link between the southern city of Nabatiyeh and al-Hujair valley region farther south.

Israel also struck two bridges in Qasmiyeh and Matariyeh and another in Burj Rahhal linking the city of Tyre to Sidon. Other strikes on south Lebanon hit al-Qlayleh, al-Henniyeh, Jwaya, al-Tiri, Zrarieh, Hamoul, al-Bayyada, Shehabiyeh, Tebnine, Majdal Selem, Shaqra, Ainata, al-Khiam, Maroun al-Rass, and al-Rihan.