Iran's chief negotiator warned Thursday of a lingering "lack of trust" and "major differences" at nuclear talks with world powers in Geneva, saying it was hampering progress over a deal.

Abbas Araqchi, a deputy foreign minister, said Iran would not sign up to an agreement on its controversial nuclear program unless the so-called P5+1 group accepts what Tehran considers its right to enrich uranium.

France warned on Thursday that the Central African Republic was "on the verge of genocide," as the U.N. considers sending thousands of peacekeepers to the strife-torn country.

"It's total disorder," French Foreign Minister Laurent Fabius told France 2 television, adding that the United Nations was considering authorizing African and French troops to intervene.

France's President Francois Hollande urged Iran on Wednesday to "provide answers and not provocations" over its disputed nuclear program, after the country's supreme leader Ayatollah Ali Khamenei vowed not to retreat "one step" from Iran's rights.

"It is clear that Khamenei's proposals could not lead to calm and understanding. Iran must provide answers and not provocations," Hollande said during a press conference at the close of a Franco-Italian summit in Rome.

Three French soldiers were wounded Wednesday in rebel-infested northern Mali when their armored truck hit a landmine, military sources said.

"A vehicle of the French army was hit by an explosion likely caused by a bomb, a mine on which the vehicle drove, around 1:00 am (0100 GMT) on Wednesday. Three French soldiers were wounded but their lives are not in danger," a Malian security source told Agence France Presse.

French President Francois Hollande on Wednesday called on the world to act over violence in the Central African Republic amid fears of a sectarian bloodbath in the deeply unstable country.

Hollande told government ministers the international community "cannot accept the abuses currently taking place, must take action and of course France will take its share of the responsibility for doing so," according to government spokeswoman Najat Vallaud-Belkacem.

Iran supreme leader Ayatollah Ali Khamenei's latest controversial comments on Israel "complicate" ongoing negotiations on Tehran's disputed nuclear program, a French government spokeswoman said Wednesday.

"Khamenei's comments are unacceptable and complicate negotiations," Najat Vallaud-Belkacem told reporters.

Iran's top decision-maker Ayatollah Ali Khamenei said Wednesday he will not allow any "retreat" on Tehran's nuclear rights, ahead of a new round of talks with world powers.

While expressing support for negotiators engaging in nuclear talks in Geneva today, the supreme leader said the Iranian team was instructed to respect Tehran's "red lines."

A small plane crashed Tuesday in France's central Burgundy region while flying in bad weather, killing six people, officials said.

The crash occurred a little after 11:00 am (1000 GMT) in a field near the village of Mouffy, firefighters said.

UK Foreign Minister William Hague condemned the twin bombings that erupted near the Iranian embassy in Beirut on Tuesday, offering his condolences to the families of the victims.

He said in a statement: “I strongly condemn the shocking terrorist attack on the Iranian embassy in southern Beirut that has led to such tragic loss of life.”

Authorities in northern Somalia's semi-autonomous Puntland region have arrested a British and French nationals for spying, officials said.

"We have arrested a network of spies who entered the country while disguised as NGO workers," Puntland Security minister Kalif Ise Mudan told reporters Monday.