France: 4 detained after knife attack in Marseille

French police investigating a knife attack that left two young women dead in the southern port of Marseille said they detained four people today.
A judicial official said the four were in custody on suspicion of association with a terrorist group. Several places were being searched in the probe.
The official, who spoke on condition of anonymity under internal rules, wouldn't give more details.
Interior Minister Gerard Collomb said on France-Inter radio today that the assailant in Sunday's attack had Italian residency and a valid Tunisian passport. The attacker was killed by soldiers after the stabbings, which were claimed by the Islamic State group.

One of the seven IDs the attacker used in previous encounters with French police was a Tunisian passport identifying him as Ahmed H. A judicial official said today that authorities have determined that is the Marseille attacker's true identity.
Rome prosecutors opened a terrorism investigation into the suspect, identified in the Italian media as Ahmed Hanachi.

He had lived in Aprilia, south of Rome, from about 2006 to 2014, Italian news agency ANSA said.
He had a record for petty crimes but no terrorism-related offenses or indications he had been radicalized, Italian daily La Repubblica said.
The reports said he lived in an area with a sizeable Tunisian community, and had married then divorced an Italian woman.

The region has already seen four people expelled from Italy for alleged radicalization-related reasons, Repubblica said. Citing state security, Italy has expelled more than 200 people since 2015 who are suspected of radicalizing others or recruiting would-be jihadis offenses that wouldn't necessarily hold up in court but which the Interior Ministry uses as reason to expel them.
The area south of Rome was also where the Berlin Christmas market attacker, Anis Amri, spent about a week in July 2015 after getting out of an Italian prison. There's no indication the two ever crossed paths, Repubblica said, without citing sources.
The French interior minister also said he has ordered an internal investigation into why the Marseille attacker had seven encounters with French police and had no residency papers, but wasn't expelled from the country. His latest arrest was just two days before the stabbing, when he was picked up for shoplifting and released.