"The man claims that he wanted to buy a car from the wife of Coulibaly," said federal prosecutor's spokesman Eric Van der Sypt. "At this moment this is the only link between what happened in Paris."

The terror attacks in Paris occurred in an atmosphere of rising anti-Semitism in France and have prompted scattered retaliatory violence against Muslims and Muslim sites around France. Justice officials have also been cracking down by arresting dozens of people who glorified terrorism or made racist or anti-Semitic remarks.

French President Francois Hollande insisted Thursday that any anti-Muslim or anti-Semitic acts must be "severely punished." He said France's millions of Muslims should be protected and respected, "just as they themselves should respect the nation" and its strictly secular values.

"In the face of terrorism, we are all united," he said at the Institute of the Arab World in Paris.

The government announced Thursday it would give citizenship to a Malian immigrant who saved several Jewish shoppers last week by hiding them in the kosher market's basement before sneaking out to brief police on Coulibaly, the hostage-taker upstairs. Interior Minister Bernard Cazeneuve said he would personally preside over the ceremony for Lassana Bathily on Tuesday.

Among the victims buried Thursday were Charlie Hebdo cartoonists Georges Wolinski and Bernard Verlhac, both laid to rest in Paris' famed Pere-Lachaise cemetery. Verlhac, who drew under the name Tignous, was buried in a plain wood coffin decorated with cartoons by his friends.

Three other victims of the attacks — Charlie Hebdo columnists Bernard Maris and Elsa Cayat, and Franck Brinsolaro, the policeman bodyguard for slain Charlie Hebdo chief Stephane Charbonnier — were also buried Thursday.

With 120,000 security forces deployed to prevent future attacks, nerves jumped overnight when a car rammed into a policewoman guarding the president's palace. Prosecutors and police said, however, the incident at the Elysee Palace had no apparent links to last week's shootings.

A car carrying four people took a one-way street in the wrong direction then drove off when the police officer tried to stop them. The officer sustained slight leg injuries, police said. Two people were later arrested and two others in the car fled.

Customers lined up again Thursday to try to get copies of Charlie Hebdo's first edition since the attacks. Even though it had a special increased print run of 5 million copies, it sold out before dawn Thursday in Paris kiosks for a second straight day.

Some Muslims, who believe their faith forbids depictions of the prophet, reacted with dismay or anger to the new cover. In Pakistan, lawmakers marched outside parliament Thursday to protest the publication.

A leader of Yemen's al-Qaida branch officially claimed responsibility for the attacks at Charlie Hebdo, saying in a video the slayings were in "vengeance for the prophet." But U.S. and French intelligence officials lean toward an assessment that the Paris terror attacks were inspired by al-Qaida but not directly supervised by the group.

Speaking on the papal plane, Pope Francis expressed his belief that there were limits to freedom of expression, using Alberto Gasparri, who organizes papal trips and was standing by his side, as an example.

"If my good friend Dr. Gasparri says a curse word against my mother, he can expect a punch," Francis said, throwing a pretend punch. "You cannot provoke. You cannot insult the faith of others. You cannot make fun of the faith of others."

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Angela Charlton, Lori Hinnant, and Nicolas Vaux-Montagny in Paris, Nicole Winfield on the papal plane, Raf Casert in Brussels and Matthew Lee in Sofia, Bulgaria contributed to this report.

By Jamey Keaten And Sylvie Corbet, The Associated Press