President Joseph Aoun spoke with senior U.S. and Qatari officials on Monday about consolidating a ceasefire in Lebanon and forming a "de-confliction cell", his office said, after U.S.-Iran negotiations in Switzerland.

Fighting between Israel and Hezbollah has repeatedly threatened to derail regional peace efforts.

There was cautious calm Monday in Lebanon, with no Israeli strikes reported overnight after a day of quiet Sunday.

Hezbollah likewise has not announced any attacks on Israeli forces since Saturday.

Iran's chief negotiator Mohammad Bagher Ghalibaf on Sunday warned the United States against making threats at the Islamic republic, vowing that "our armed forces are ready to respond".

U.S. President Donald Trump said Sunday in a surprising statement that "Iran must immediately stop their highly paid PROXIES in Lebanon from causing trouble," apparently referring to Iran-backed Hezbollah.

Cautious calm has been engulfing south Lebanon since Saturday, after Israel's political leadership ordered its army to cease its operations, reportedly following intense U.S. pressure to do so.

U.S. Vice President JD Vance has said that Lebanon is one of "two big things" that will be discussed in the negotiations with Iran, as he departed from Washington for Switzerland.

Israeli Prime Minister Benjamin Netanyahu and Defense Minister Israel Katz on Saturday ordered the Israeli army to halt its operations in Lebanon while maintaining its positions, Israeli reports said.

Pakistani Interior Minister Mohsin Naqvi, who is currently visiting Iran, will convey messages to Tehran regarding the nuclear negotiations, specifically relating to the thorny issue of Lebanon, sources told Al-Arabiya television.

Israel carried out deadly strikes in south Lebanon on Saturday and Hezbollah maintained it had the right to respond, hours after the United States announced a renewed ceasefire in fighting that had strained a fledgling deal with Iran.

Israel and Hezbollah have agreed a ceasefire that begins 4pm Friday Beirut time, a U.S. official said Friday, after deadly new exchanges in Lebanon put the deal to end the Middle East war under strain.