Huthi rebels in Yemen are posing a threat to shipping in the strategic Bab al-Mandab strait, the Saudi-led coalition supporting the government said Sunday after an attack on an Emirati vessel.

The coalition said Shiite Huthi militiamen had attacked the vessel "on its usual route to and from (the southern port city of) Aden to transfer relief and medical aid and evacuate wounded civilians."

French carmaker Renault said Friday it would start a joint venture in Iran, tapping into the country's fast-growing car market as it opens up to foreign investment after the end of Western sanctions.

Russia said Friday it was waiting to see the details of OPEC's surprise agreement to cut oil output before deciding on any freeze to its own production. 

"During October and November the OPEC countries will work out the specific parameters of their proposal," Russian news agency Interfax quoted energy minister Alexander Novak as saying.

Shares in Germany's biggest lender Deutsche Bank plummeted on the Frankfurt stock market on Friday, dragging other European banks and global markets down with it, after reports some customers were pulling money out.

The investors were reacting to a $14-billion fine demand from the US Department of Justice (DoJ) and conflicting reports in German media over whether Berlin would come to the troubled bank's aid if necessary, which have sapped the bank's market valuation since Monday.

The Danish tax authority said on Thursday it had paid an anonymous source almost six million kroner (0.81 million euros, $0.9 million) for leaked data from the Panama Papers on hundreds of Danes.

The contract for a French-Chinese consortium to build Britain's first nuclear plant in a generation was signed on Thursday at a low-key ceremony, after a string of controversies threatened to scupper the huge deal.

Russian Energy Minister Alexander Novak on Thursday said Russia intends to keep oil production at current levels, hailing OPEC's surprise decision to cut oil output.

OPEC's deal to cut oil output in a bid to push up prices raises questions and uncertainty about whether it will last.

The number of foreigners visiting Turkey plummeted nearly 38 percent in August, with tourism battered by the July failed coup and security concerns after attacks, statistics showed Thursday.

An oil price rally fueled by OPEC's deal to cut crude output fizzled out Thursday with analysts doubting the cartel's ability to seriously tackle a supply glut.

Following a meeting that included Russia, the Organization of Petroleum Exporting Countries shocked markets Wednesday by saying it planned to trim total production by some 750,000 barrels per day.