Hezbollah vowed Sunday to confront the United States and Israel over their strikes on the group's key backer Iran.

"We will undertake our duty of confronting the aggression," Hezbollah chief Sheikh Naim Qassem said in a statement, adding that his group would not leave "the field of honor and resistance".

The U.S. ambassador to Lebanon informed the country that Israel had no intention of escalating hostilities as long as no attacks were launched from Lebanon, the Lebanese presidency said in a statement.

The message came as Lebanese authorities fear Iran-backed Hezbollah could become embroiled in renewed conflict with Israel after the U.S. and Israel bombed Iran on Saturday and Tehran responded with missile attacks.

Lebanon's Iran-backed Hezbollah called on Saturday for the Middle East to stand against Israel and the United States' attack on Iran.

In a post on X, United Nations special coordinator for Lebanon Jeanine Hennis-Plasschaert urged "all parties in Lebanon" to "prioritize, in words and actions, the need to shield the country and its people from unfolding regional developments".

The remarks come after Israel and the United States launched strikes against Iran.

President Joseph Aoun urged everyone to show full commitment to national responsibility and to prioritize Lebanon's interests and the Lebanese people above any other consideration, after Israel and the United States launched strikes on Iran, with fears in Lebanon that Hezbollah joins the fray.

Aoun said that "sparing Lebanon from the disasters and horrors of external conflicts, and safeguarding its sovereignty, security, and stability, are absolute priorities."

Prime Minister Nawaf Salam said Saturday that Lebanon refuses to be dragged into war, after Israel and the United States launched strikes against Iran.

Authorities fear Iran-backed Hezbollah could become involved in the conflict, which saw the U.S. and Israel bomb Iran on Saturday and Tehran respond with missile attacks.

As Lebanon prepares for its parliamentary elections, several media reports and politicians claim that the country is under pressure to postpone the juncture.

Prime Minister Nawaf Salam denied the claims, in an interview Thursday. No one has urged him to hold or to postpone the elections, he said.

In a step carrying political indications, al-Mustaqbal Movement has asked dozens of its members and figures close to it to officially submit their parliamentary vote nominations next week, An-Nahar newspaper reported on Friday.

The Movement, whose political activities have been suspended for the past few years, intends to take part in the elections in terms of both nominations and voting, the daily said.

Embassies concerned with the Lebanese file have delivered warning messages to President Joseph Aoun, Speaker Nabih Berri and PM Nawaf Salam, cautioning them that “any intervention from Lebanon in the war with Israel will lead to a harsh new war,” diplomatic sources told Al-Jadeed TV.

“The Israeli war messages began to arrive through the latest airstrikes, amid information about an escalation that will first begin in the Bekaa,” military sources told the TV network.

Amal MP Ali Hassan Khalil hit Friday at Prime Minister Nawaf Salam for being a judge who doesn't respect the law, after the latter said that the current electoral law allows expatriates to vote for all 128 deputies.

Salam's comments come as Lebanon heads to parliamentary elections with ambiguity over how the expats would vote. Amal and Hezbollah are in favor of implementing a suspended law that only allows expats to vote for six newly-introduced seats instead of voting for all 128 seats. They argue that they do not enjoy the same campaigning freedom that other parties enjoy abroad.