In telephone talks with President Hassan Rouhani, Macron emphasised the "necessity for all the powers concerned... to avoid any outside interference and to support the putting in place of a government which can manage the emergency," the Elysee said.

Lebanon's government under Prime Minister Hassan Diab resigned this week following days of demonstrations demanding accountability over the explosion at the Beirut port last week that devastated entire neighbourhoods of the city.

Iran wields huge influence in Lebanon through the Shiite group Hezbollah which was strongly represented in the outgoing government and has an alliance with the faction of President Michel Aoun.

The explosion, which left 171 people dead, has been blamed on a vast stock of ammonium nitrate allowed to rot for years at the port despite repeated warnings.

Macron, who was the first world leader to visit Beirut after the explosion, has taken the lead role in coordinating the international response and at the weekend chaired a virtual aid conference that drummed up more than 250 million euros ($295 million) in pledges.