French pensions protesters set off flares and storm Louis Vuitton's Paris HQ

The protesters stormed the Paris offices of Louis Vuitton

Protesters have forced their way into the Paris headquarters of Moët Hennessy Louis Vuitton (LVMH), the world's largest luxury goods retailer.

It comes on the 12th day of national strikes and demonstrations in France over government plans to raise the retirement age from 62 to 64.

"You're looking for money to finance pensions? Take it from the pockets of billionaires," said Sud Rail unionist Fabien Villedieu, as the building filled with red smoke from flares carried by the demonstrators.

"After three months of mobilisation, I would lie if I told you that there is no fatigue. We are tired, but a mobilisation is like a marathon. We won't give up," he added.

The chairman of LVMH is business magnate Bernard Arnault, identified by Forbes as the world's richest man worth £175bn.

Some 600,000 people are expected to take to the streets across the country against the planned reforms.

Trade unions urged a show of force on the streets a day before France rules on the legality of the pension plans which have coalesced widespread anger against President Macron who says the law is essential to ensure France's generous pension system does not go bust.

Union leaders say the system be saved by other means: "The president of the republic is completely disconnected from the preoccupations of workers," the head of the French Democratic Confederation of Labour said.