There have been further blockades of fuel depots in western France French truck drivers are the latest group of workers to join the strike movement against government plans to reform the state pension system.
They have staged several overnight protests, including a go-slow on motorways near Lille and Paris.
The government wants to raise the retirement age from 60 to 62 and the full state pension age from 65 to 67.
A further day of strikes is scheduled for Tuesday. The Senate is due to vote on the pensions bill on Wednesday.
More go-slow protests by truck drivers are planned during the rest of the day.
Workers at France’s 12 oil refineries remain on strike for the seventh day on Monday, unions officials have said.
“As long as the government won’t budge, we won’t budge either,” one CGT official told Reuters news agency.
There have been further blockades of fuel depots in western France.
The government remains firm in face of the protests.
“I won’t let the French economy suffer from a supply blockage,” Prime Minister Francois Fillon said on Sunday.
“The right to strike isn’t the right to stop access to a fuel depot. That’s an illegal action,” the prime minister said on French television.
Several government ministers have said the country was not at risk of fuel shortages.
France has a strategic fuel reserve which holds up to three months of supplies.
But according to the latest opinion polls, more than 70% of French people continue to support strike action.
Rail unions have called for new transport strikes to start on Tuesday, including the Eurotunnel services between France and England.
Rail traffic was already being disrupted on Monday with one in two fast TGV trains running, and one in three normal-speed trains running.
Although the Eurostar train service between Paris and London is normal, there is no Eurostar service between Brussels and London on Monday due to a strike in Belgium.
On Saturday, a fifth day of protests brought 825,000 people on to the streets, police said, although unions put the figure at 2.5 million to 3 million.
The pension reforms have already been approved by the National Assembly, the lower house of the French parliament.
The upper house, the Senate, has endorsed the key articles on raising the retirement age, and is due to vote on the full text on Wednesday.
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