France's state of emergency imposed after last year's terror attacks in Paris is likely to be extended, Prime Minister Manuel Valls has told the BBC. He said the measures were needed to protect democracy, reports BBC News.
France is marking a year since militants from so-called Islamic State (IS) killed 130 people in gun and bomb attacks around the capital.
President François Hollande unveiled plaques for the victims, most of whom died at the Bataclan concert hall.
Three gunmen entered the venue and fired on the crowd, killing 90 people.
On Saturday night, the hall reopened for the first time with a performance by British rock artist Sting.
Mr Valls told the BBC he kept on his desk the photograph of a friend's son who was killed in the Paris attacks.
"As head of government and as a French citizen I too am permanently marked by what we experienced," he said.
Speaking to the BBC's Hardtalk programme, Prime Minister Valls said there was a risk of "attacks of the kind we saw in Nice", where a lorry driver ploughed through a crowd, killing 84 people on Bastille Day, in an attack again claimed by IS.
The state of emergency gives the police extra powers to carry out searches and to place people under house arrest.
Mr Valls said the country must remain safe as it prepared for presidential and parliamentary elections in the spring.
It promises to be one of the most divisive electoral seasons in living memory, with far-right leader Marine Le Pen tipped to reach the run-off round of the presidential race.
Meanwhile, opinion polls suggest President Hollande, a socialist, is the most unpopular president in French history.
See more of this report, with video of the interview with Manuel Valls, on BBC News.