While the assassin of the Notre-Dame de Nice attack is not yet out of the woods and cannot be questioned, investigators are looking for possible accomplices.

A 47-year-old man currently in police custody, without anyone knowing for the moment the content of his links with the killer.

The investigation continues the day after the attack on Notre-Dame de Nice, which made three Thursday morning.

The murderer is not out of the woods, the prognosis is reserved.

The municipal police officers who stopped him after his massacre shot him 14 times.

But what do we know now about this 21-year-old Tunisian?

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We know that he arrived in France in October, without making an asylum request.

He landed on the Italian island of Lampedusa on September 20, among dozens of makeshift boats, three weeks after the opening of the trial of the January 2015 attacks and the republication of the Muhammad cartoons by

Charlie Hebdo

.

The investigation will have to demonstrate if this is the trigger for his departure to France.

We also know that he entered the continent via Bari in Italy, still on October 9, then that he was left free by the Italian authorities despite a ban on leaving Italian territory.

47-year-old man in custody

What did he do afterwards, until he entered Nice station on the morning of the attack?

Did he leave Tunisia with the precise idea of ​​attacking France?

Did he have any accomplices?

Investigators will have to trace the killer's contacts, in particular thanks to his two phones, found in his belongings in the church in Nice, with a Koran and two other unused knives.

The police have in any case found the trace of the one who would be his last physical contact, the day before the attack, in Nice, spotted thanks to video surveillance: a 47-year-old man currently in police custody, without the we do not know for the moment the content of their exchange.