Several people have reportedly been killed by Israeli airstrikes on southern Lebanon, less than 24 hours after a new ceasefire between Israel and Hezbollah was announced.

The Lebanese state news agency said at least 11 people have been killed after Israeli warplanes, drones, and artillery targeted more than a dozen areas, many around the city of Nabatieh.

The Israeli military said it struck "Hezbollah terrorist targets" after the group fired over 50 projectiles at Israeli forces in southern Lebanon.

Washington has criticised Israel's ongoing operations in Lebanon, which was drawn into the US-Iran war when Hezbollah launched rockets into Israel in March, in retaliation for a strike that killed Iran's supreme leader.

Washington also fears that continued tensions between Israel and Lebanon could undermine the US peace deal with Iran, which includes a commitment to end fighting on "all fronts" including Lebanon. Tehran has insisted that Lebanon must be part of any broader agreement to end the conflict.

US envoy, Steve Witkoff, is reported to be heading to Switzerland for initial talks with Iran to help cement the agreement.

Israeli Prime Minister Benjamin Netanyahu has been under domestic pressure to continue military action against Hezbollah, an Iran-backed Shia Muslim political and military group in Lebanon.

Hezbollah has said that if Israel's invasion of southern Lebanon persists, it will continue its attacks.

Earlier this week, the White House criticised the Israeli government's military operation in Lebanon, saying it risks scuppering the peace deal. But speaking near Washington as he unveiled a new Air Force One jet, President Donald Trump praised Netanyahu, calling him a "warrior".

When Hezbollah launched its rockets and drones into Israel in early March, drawing Lebanon into the Iran conflict, Israel responded by launching a bombing campaign across Lebanon. It is occupying around 5% of the country's territory in the south, with the aim of driving back Hezbollah fighters from its northern border.

Around a million people remain displaced, while dozens of communities in the south have been completely destroyed.