PARIS (AP) — The last known survivor of the team that carried out last November's Paris attacks faced questioning Friday for the first time since his extradition from Belgium last month, and French authorities hope Salah Abdeslam's testimony sheds light on the Islamic State group's strategies in Europe.

Abdeslam was transferred Friday morning from a high-security prison in the Parisian suburb of Fleury-Merogis to the main Paris courthouse for questioning by counter-terrorism judges.

Extra gendarmes were posted throughout the imposing Palace of Justice, on an island in central Paris, among the heightened security precautions in place for the questioning by anti-terrorist judges behind closed doors. The Associated Press filmed a convoy of cars arriving at the courthouse that was believed to be carrying Abdeslam, though court officials would neither confirm nor deny his presence. A helicopter was seen flying overhead.

Abdeslam, 26, a French citizen of Moroccan origin, was handed a half-dozen preliminary terrorism charges after his transfer on April 27 from Belgium, where he was arrested after four months on the run.

He is the only suspect still alive believed to have played a direct role in the Nov. 13 bloodshed at a concert hall, stadium and Parisian cafes, which killed 130 people. The other attackers died in suicide bombings or under police fire.

His lawyer Frank Berton had said after his transfer that his client "has things to say, that he wants to explain his route to radicalization" and his role in the attacks — but not take responsibility for the crimes of others.

Authorities and families of attack victims hope Abdeslam's testimony will shed light on how IS plotted the attacks, solve mysteries that remain about what exactly happened Nov. 13, and identify others who might have been involved, or support networks still hiding in the shadows.

Abdeslam's precise role in the attacks has never been clear. The Paris prosecutor has said he was equipped as a suicide bomber, but abandoned his plans and fled to Belgium, where he had grown up. Abdeslam's older brother blew himself up at a cafe during the Paris attacks.

Abdeslam was captured March 18 at a hideout near his childhood home in Brussels' Molenbeek neighborhood. Four days later, suicide bombers detonated their explosives in the Brussels airport and metro, killing 32 people.

Berton, Abdeslam's lawyer, arriving at the Palace of Justice, said questioning was to begin at 10 a.m. (0800 GMT). Berton said he last met with his client on Thursday, but did not elaborate.

Questioning could last all day.