Officials say the seven men and a woman detained in the Paris and Lyon areas are not suspected of links to the Paris attacks of January 7th to 9th.
After Paris talks with Greek counterpart, French finance minister offered support for new timeframe or terms but not cancelling the debt.
Initiative by mayor Anne Hidalgo is first step on the way to making the French capital a diesel-free city by 2020.
The gulf separating the populations of high-rise, low income, out-of-town neighbourhoods from the rest of France is wider today than ever.
The terrorist attacks in Paris in early January demand an awakening of French society, writes Mediapart editor-in-chief Edwy Plenel. Not one driven by the politics of fear that put the country at war, but one of democratic and social aspirations that demand equality for every member of the population and which, he argues here, is the only solution for eradicating the necrosis of hope that fuels the ‘identity’ conflict blighting France today.
Malian-born Lassana Bathily, 24, who came to France eight years ago, said 'I'm not a hero' and that he was 'proud and moved' to become French.
Anne Hidalgo said an interview with a so-called security expert who claimed parts of Paris were like Baghdad had "prejudiced" the city's image.
The group are suspected of providing logistical help to Amedy Coulibaly, the gunman who killed four Jewish hostages on January 9th.
The arrests of people suspected of giving logistical support to the three terrorists who claimed 17 lives last week were in suburbs around Paris.
The US secretary of state, absent from Sunday's march in the French capital, met with President Hollande and gave a speech at Paris city hall.
The practising Muslim from Mali said his actions were those that any human should take for others facing threats from a common enemy.
Dieudonné, previously convicted for inciting anti-Semitism, posted support for gunman who last week murdered four in a Paris kosher store.
As seven of last week's Paris shootings victims were buried, France issued arrest warrant for a man held in Bulgaria linked to one of the gunmen.
The two brothers who last week carried out the shooting attack on the offices of Charlie Hebdo magazine were the object of separate surveillance operations by French intelligence services between 2011 and 2014, which was halted last summer after it apparently failed to uncover evidence that they were involved in terrorist activity, Mediapart can reveal. Meanwhile, the third terrorist, Amedy Coulibaly, who killed five people during the Paris terror attacks last week, fell completely off the radar of anti-terrorist services after his release in March last year from prison where he had been serving time for his involvement in a plot to free a convicted terrorist from jail. Fabrice Arfi reports.
More than three-and-a-half million people took to the streets of France on Sunday. They were the biggest demonstrations seen in the country since the World War II liberation of France in 1944. Those who marched did so with a variety of different hopes but with one single demand: to raise the level of public debate in this country. It is now down to the government to pick up the theme, argues Mediapart's editor François Bonnet, even if, since his election in 2012, President François Hollande, and also his prime minister Manuel Valls, have shown themselves to be deaf to the idea.