PARIS — As Israel solemnly buried the four Jews killed here on Friday and President François Hollande of France paid tribute to the three police officers who died in last week’s terrorist attacks, the French Parliament was set on Tuesday to vote on renewing the mandate of its forces supporting the military campaign against Islamic extremists in Iraq.

“We have not finished with this threat,” Mr. Hollande told those attending the memorial for the police officers at the central police station in Paris.

“It is here and it is present,” he said. “We should redouble our vigilance.”

In the lower house of Parliament, the National Assembly, legislators on Tuesday planned to pay homage to the 17 victims of the attacks — the 12 killed at the office of Charlie Hebdo on Wednesday, a police officer killed in the southern suburb of Montrouge on Thursday and the four people who died at the kosher supermarket on Friday.

Also on Tuesday, the authorities in Bulgaria said they had arrested a French citizen believed to have links to one of the brothers suspected of the Charlie Hebdo shootings, The Associated Press reported.

Darina Slavova, regional prosecutor of the southern province of Haskovo, said on the Nova TV channel that Fritz-Joly Joachin, 29, had two European arrest warrants issued against him, including one for participating in a criminal organization with a terrorist aim.

The Bulgarian prosecutor said the warrant cited his possible association with one of the attackers, Chérif Kouachi.

Bulgaria was the site of suicide attack on a tourist bus outside an airport in the city of Burgasin in July 2012 that killed five Israelis, a Bulgarian bus driver and the bomber.

At the time of the attack, Bulgaria was believed to have been chosen as a target because of its popularity with Israeli tourists and because security was more lax than in other European countries. The Bulgarian authorities have implicated Hezbollah in the attack.

On Monday, the French authorities announced an extraordinary deployment of over 10,000 military personnel and thousands of police officers to guard key installations such as transport hubs and major buildings.

“Thisis amilitaryoperationlikethemilitaryoperationsweconductabroad,”thedefenseminister, Jean-Yves LeDrian,said onTuesday,andwasdirectedat “the same enemy” as France isseekingtocurbwith thedeploymentof 3,000 troopsagainstIslamic militants innorthernAfrica.

“The threat level is very high, and today the new and serious element is that there is no dividing line between the external threat and the internal threat,” Mr. Le Drian said.

The attack on the satirical newspaper, Charlie Hebdo, was ostensibly intended to punish its cartoonists and journalists for lampooning the Prophet Muhammad. But survivors of the attack signaled on Monday that they did not feel cowed.

Their first cover since the attack — to be published in a huge print run of up to 3 million copies on Wednesday — shows the prophet displaying the slogan that has become the symbol of resistance to Islamic militants: “Je suis Charlie,” or, “I am Charlie.”

One of the slain police officers was Ahmed Merabet, 40, a French Muslim, whose death on a sidewalk near the Charlie Hebdo office was captured on amateur video. The other slain officers have been identified as Franck Brinsolaro, 49, who was assigned to guard Stéphane Charbonnier, the editorial director of Charlie Hebdo, and Clarissa Jean-Philippe, 27, killed on Thursday in Montrouge.

All three have been awarded the Légion d’Honneur, one of France’s highest distinctions.

“They died so that we may live in freedom,” Mr. Hollande said at the memorial service.

The ceremony ended with the somber strains of Chopin’s funeral march.

In virtually simultaneous counterattacks on Friday, three militants were killed by the police. Chérif Kouachi and his brother, Saïd, were shot to death at a print shop outside Paris. The third attacker, Amedy Coulibaly, was shot when police officers stormed the kosher supermarket where four victims had been killed.

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