Paris prosecutor spokesman Denis Fauriat said nine other suspects detained on Friday will have questioning prolonged by 48 hours, a step allowed under France’s tough anti-terror laws.
Police in France, Germany and Belgium have arrested dozens of suspects in recent days as part of the anti-terror sweep sparked by the bloody spree in and around Paris, in which brothers Said and Cherif Kouachi and their friend Amedy Coulibaly killed 17 people at the satirical newspaper Charlie Hebdo, a kosher grocery and elsewhere.
One of the brothers who carried out the attack on Charlie Hebdo, Said Kouachi, has been buried in an unmarked grave in the city of Reims, reportedly against the objections of city officials.
Fallout from the attacks has spread around the world. Demonstrations in support of the murdered Charlie Hebdo journalists have been held in countries from the United States to Brazil, and violent protests against the magazine’s depictions of the Prophet Muhammad have taken place in Niger, Pakistan and Algeria.
French, German, Belgian and Irish police rounded up dozens of suspects earlier this week as anxiety spread across Europe and authorities rushed to thwart further attacks.
Belgian police launched a vast anti-terrorism sweep in and around Brussels and the eastern industrial city of Verviers on Thursday, which left two suspects dead. Police say the suspects were within hours of implementing a plan to kill police.
On Saturday, soldiers fanned out to guard possible terror targets in Belgium while police in Greece detained at least two suspects as part of the widening counter-terrorism dragnet across the continent.
Authorities say there was no apparent link between the foiled plots in Belgium and the terror attacks in Paris.
President Francois Hollande said France is “waging war” on terrorism, and it shows on the streets of Paris and elsewhere, where 122,000 police and well-armed troops have been deployed to protect the country.
Meanwhile, Italy says it has expelled nine suspected jihadis since late December and is vowing more expulsions. Interior minister Angelino Alfano said the expelled include five Tunisians and citizens from Turkey, Egypt, Morocco and Pakistan.
The expulsions to their countries of origin began before the terror attack in Paris.
Mr Alfano said the nine had long-held residency permits and included people who supported, and recruited members for, the “Islamic State” group (IS) and who “radicalised themselves on the web”.
In addition, Italy has identified 59 people who have travelled from Italy to Syria to fight, including five Italian citizens and two with double-citizenship.
Members of the first known IS cell operating inside Israel have been arrested, the country’s Shin Bet security service said.
The intelligence agency said the seven cell members belong to the country’s Arab minority.
It said they were caught just before executing an attack and were practising on animals how to behead people.