Iran's foreign ministry spokesman Esmaeil Baghaei on Monday criticized what he called the United States' "destabilizing presence" after the deployment of B-52 bombers in the region.

Iran's president said a potential ceasefire between its allies and Israel "could affect the intensity" of Tehran's response to Israel's recent strikes on Iranian military sites.

Hezbollah said on Sunday it launched a barrage of missiles at an Israeli military base in the northern coastal city of Haifa.

The Iran-backed group said in a statement that it had targeted "for the first time the technical base of Haifa, affiliated with the Israeli air force" with a barrage of missiles, after it earlier claimed a drone attack on another military base south of the city.

An air strike killed at least three people in the Sidon suburb of Haret Saida on Sunday, the health ministry said, as more bombs hit the country's east.

"The Israeli enemy's raid on Haret Saida resulted in an initial death toll of three people killed and nine others injured," the ministry said, referring to a densely populated area near Sidon.

Hezbollah said it fired rockets at the northern Israeli city of Safad on Monday, the latest attack in more than a month of war.

Hezbollah fighters launched a "big rocket salvo" at the city, the group said in a statement.

The Israeli military said on Monday it had killed a top Hezbollah commander it accused of overseeing rocket and anti-tank missile attacks against Israeli forces in southern Lebanon.

Israeli Prime Minister Benjamin Netanyahu on Sunday vowed during a visit to the Lebanon border to respond "firmly" to Hezbollah's attacks and to prevent the group from rearming, his office said.

The Israeli military on Sunday called for the evacuation of the Baalbek area in eastern Lebanon, warning that it was ready to strike Hezbollah targets there and in nearby Douris.

In the Christian town of Deir al-Ahmar, Hassan Noun has pitched his tent in a church courtyard after fleeing Israeli air strikes in the eastern Lebanese region of Baalbek.

U.N. refugee chief Filippo Grandi said an Israeli air strike hit "humanitarian structures" Saturday at a border crossing between Lebanon and Syria that was previously hit last month.