PARIS, April 18 (Reuters) - A French soldier who was part of international Forces stationed in southern Lebanon was killed, President Emmanuel Macron said on Saturday, adding that evidence suggests Iran-backed armed group Hezbollah was responsible for the attack.

Three other soldiers were wounded and have been evacuated, Macron said in a post on X, urging the Lebanese government to act against the alleged perpetrators.

The soldiers were part of the UN Interim Force in Lebanon (UNIFIL), a peacekeeping mission in the country's south.

BARCELONA, April 18 (Reuters) - The five permanent members of the United Nations' Security Council should agree to change their behaviour after failing to stop the war in Iran, Brazilian President Luiz Inacio Lula da Silva told a progressive leaders' summit in Barcelona on Saturday.

"We cannot wake up every morning and go to bed every night with a tweet from a president threatening the world and declaring wars," Lula added in apparent reference to U.S. President Donald Trump without explicitly naming him.

A French soldier was killed and three others wounded in an ambush Saturday on UN peacekeepers in Lebanon that French President Emmanuel Macron blamed on Hezbollah, an accusation the group has denied.

The attack follows an agreement between Israel and Lebanon on Thursday for a 10-day ceasefire to negotiate an end to six weeks of fighting between Israel and the Iran-backed group.

"Everything points to Hezbollah being responsible for this attack," Macron said on X, urging Lebanese authorities to arrest the perpetrators.

By Tuvan Gumrukcu

ANTALYA, Turkey, April 18 (Reuters) - No date has been set for the next round of negotiations between Iran and the United States,Iran's deputy foreign minister said on Saturday, adding that a framework of understanding must be agreed first.

The highest-level U.S.-Iran talks since the 1979 Islamic Revolution ended in Islamabad without agreement last weekend.

The latest developments in the Middle East war:

- Israeli soldier killed -

Israel's military said a soldier died during combat in southern Lebanon, where fighting has not stopped despite a temporary ceasefire.

It was the second death of a soldier announced by Israel since the start of a 10-day truce announced by the United States began on Friday -- part of wider efforts to bring a permanent end to the Middle East war.

April 18 (Reuters) - Lebanese Prime Minister Nawaf Salam condemned an attack on members of the French contingent of the U.N. peacekeeping force UNIFIL on Saturday and ordered an immediate investigation into the incident, according to a post on X.

(Reporting by Enas Alashray; Editing by Emelia Sithole-Matarise)

No date has been set for the next round of Iran–US peace talks brokered by Pakistan following the failure of an initial round, Iran's deputy foreign minister said on Saturday.

"Until we agree on the framework, we cannot set a date," Saeed Khatibzadeh told journalists on the sidelines of an annual diplomatic forum in Turkey's southern Antalya province.

"We hope that as soon as we can finalise that, then we can move on to the next step".

April 18 (Reuters) - Russian Foreign Minister Sergei Lavrov said at a summit in Turkey's Antalya that the time has come for a conversation with the U.S. about how Washington sees future economic ties with Russia, but that differences remain between the two countries.

Lavrov also said that NATO is "not in the best state", but that Russia would not meddle in the alliance's internal affairs.

Russia has made renewed economic cooperation with the U.S. a core part of its pitch for a diplomatic detente with the administration of U.S. President Donald Trump.

By Joshua McElwee

YAOUNDE, April 18 (Reuters) - Pope Leo sets off on Saturday for Angola, where he is expected to address exploitation of natural resources in the oil-rich country on the third leg of his four-nation Africa tour, during which he has taken on a new forceful speaking style.

Leo, who has been attacked repeatedly by President Donald Trump this week after the pope criticized the Iran war, will arrive from Cameroon, where on Thursday he said the world was "being ravaged by a handful of tyrants".

Commercial ships came under fire and threats from Iran's military as they tried to cross the Strait of Hormuz on Saturday, security monitors said, as Iran closed the crucial trade route again following a brief reopening.

Iran reversed its pledge to reopen the strait to commercial traffic during a ceasefire in the Middle East war in protest at an ongoing US counter-blockade of the route, a crucial passage for commodity shipments.