The leader of the Front National blasted Francois Hollande’s government for not doing enough to tackle extremism.
86 people were killed in the July 14 attack when a 19-tonne-truck was driven into crowds celebrating Bastille Day.
Marine Le Pen said Francois Hollande's government is "scared" as riots grip Paris
I would like to see all the measures (against extremism) enforced so that the existing risk is brought back to its lowest
Marine Le Pen
Miss Le Pen said: "I would like to see all the measures (against extremism) enforced so that the existing risk is brought back to its lowest.
"I have the feeling that, today, this risk remains at its highest."
France has been in a state of emergency since 130 people were killed in the November 2015 attacks in Paris.
Marine Le Pen said the French government has not done enough to tackle extremism as she visited Nice
The Front National leader made the comments as she visited the site of the Nice terror attack
Heightened security measures are expected to remain in place until after the presidential election in April.
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The presidential candidate criticised police as riots plague Paris following allegations of police brutality.
Miss Le Pen said: "We are supposed to be in a State of Emergency but you realise that every night, across the Paris suburbs and now in several towns, we witness scenes of pillaging with police forces systematically targeted and property being set on fire.
"All of this in total impunity. So we end up wondering where the government is. Where is the interior minister? He's not said anything. He's completely absent."
Get to know Marine Le Pen Sat, January 28, 2017
Marine Le Pen is a French politician who is the president of the National Front, a national-conservative political party in France and one of its main political forces.
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A French politician who is the president of the National Front (FN), a national-conservative political party in France and one of its main political forces.
A police officer has been accused of beating and raping a 22-year-old man in the suburb of Aulnay-sous-Bois.
Violence has erupted in the area, with no-go zones declared as masked men cause chaos on the streets.
Armed police have been called in and areas put on lockdown as cars are set on fire and molotov cocktails thrown at police.
The presidential candidate branded Francois Hollande's government "scared"
Miss Le Pen said: ”Considering what had happened on previous nights, we knew very well that this demonstration was going to spin out of control and serve as an excuse for hundreds of thugs to destroy everything. And we let them do it.
"Once again, the government does nothing, says nothing, when faced with these thugs.
"The government is scared. And there's nothing worse than a government that is scared."
Shocking photos depict riots in Paris after police 'sodomizes' youth Tue, February 7, 2017
Chaos in Paris as video emerges of ‘police raping black youth with truncheon’. The man was rushed to hospital and was reportedly 'traumatised' with a 'severe wound'. Clashes between young protesters and police forces sparked for the second evening and left several cars burnt and five people in custody in Aulnay-sous-Bois.
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Cars were torched
Miss Le Pen’s comments come as a poll showed Independent Emmanuel Macron beat her in a runoff in the French presidential election, but the outcome of a knockout between her and conservative Francois Fillon is set to be closer than before.
The Opinionway poll showed Miss Le Pen would get 42 per cent of votes compared to 58 per cent for Mr Fillon if the scandal-hit candidate made it through to the second round.
The rest of the poll had similar findings to previous surveys – with the Front National leader coming out with the biggest number of votes in the April 23 first round, but then losing to either Mr Macron or Mr Fillon in the second round on May 7.
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