In Strasbourg detained the other men who attacked passers-by in Paris

In a video which the SITE intelligence monitoring group said was posted by ISIL's Amaq news agency, a young man described as the attacker pledged allegiance to Islamic State leader Abu Bakr al-Baghdadi.

PARIS Investigators are following the trail of a 20-year-old Frenchman born in Chechnya who rampaged through a festive Paris neighborhood slashing passers-by with a knife, raising anew the specter of terrorism in France after less than two months of calm. The man attacked five people with a knife, one of whom died, police said.

This is the third person arrested in the investigation, after the arrest of parents Asimov in Paris.

In the video, the speaker, wearing a mask that covers most of his face, calls on "my brothers the mujahedeen" in French with scattered Arabic phrases.

Authorities say the attacker was born in the majority Muslim Russian republic of Chechnya, which has long grappled with extremism.

The parents were detained in Paris' northern 18th district and the friend was detained in the eastern French city of Strasbourg on Sunday afternoon, the judicial official said.

A 23-year-old Brazilian tourist from Washington told The Associated Press that she and her aunt saw the fatally wounded victim on the ground, watched the ambulance arrive and rescue workers try to revive him.

Police said the man, seeing them approaching, yelled out, "Shoot, shoot".

But Griveaux defended the government's efforts, saying it had foiled 22 planned terror attacks over the past 15 months.

The 21-year-old's father and mother are being held for questioning by police, a source said.

Beyond the police cordon, however, crowds still filled nearby cafes and the city's night life resumed its normal pace soon after the attack. In November that year, at least 130 were also killed in attacks at several locations across the French capital, including the Bataclan concert hall and Stade de France.

"He may have been born in Chechnya, but he grew up in French society, where his personality, his opinions and convictions were formed", Ramzan Kadyrov wrote on his Telegram channel.

We will remind, the attack occurred on Saturday evening, may 12, in a Central district of Paris.

The attacker at the age of 29 had no criminal record but he was on police watchlist for links with a person in Syria, French channel BFMTV said. Azimov, 20, was shot to death Saturday by police responding to the attack.

The injured doesn't have life risk now, according to the Chinese Embassy.

There have also been several less deadly attacks carried out by lone wolf jihadists, most of which were claimed by ISIS and carried out in the group's name.

Two of the victims were first reported in grave condition, but French Interior Minister Gérard Collomb later told reporters all the victims are recovering.

Vanessa Coleman