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Paris terrorist Salah Abdeslam has agreed to turn supergrass for French police - making the world's most wanted man now the number one ISIS target.
The 26-year-old, suspected of being the logistics chief behind the deadly Paris terror attacks in November, was captured earlier this month during a raid in Brussels.
Abdeslam has not spoken to investigators since the Belgian capital was hit by suicide bombs at the airport and a metro station last week. But this morning it emerged that Abdeslam now wants to 'cooperate' with French authorities.
The terror suspect had previously told interrogators he had intended to blow himself up at the Stade de France stadium in Paris but had backed out at the last minute.
In subsequent interviews, he has continually tried to blame the killing on other ISIS operatives, saying that he simply provided hire cars and other logistics.
There were fears before his capture that he may have tried to flee to Syria. But he may have been fearful of becoming a target himself in the ISIS heartland - having pulled out of his suicide mission.
His lawyer confirmed that his client now wanted to be extradited from Belgium to France.
'He wants to cooperate with the French authorities,' lawyer Cedric Moisse said, as a prosecutor was set to travel to the prison in the city of Bruges where Abdeslam has been held since March 18 for an extradition hearing.
Belgian Foreign Minister Didier Reynders said that Abdeslam had also been planning to target Brussels.
Another of his lawyers, Sven Mary, said last week that Abdeslam did not have prior knowledge of the March 22 attacks in the Belgian capital.
He has been linked to at least two of the bombers. Khalid El Bakraoui, who blew himself up at the metro, rented a flat in Brussels where Abdeslam's fingerprints were found following a raid.
The second airport bomber, Najim Laachraoui, once drove to Hungary with Abdeslam.
There was high security this morning as police forces guarded the entrance of Brussels court ahead of the decision over whether to extradite Abdeslam.
Courts will also decide today whether three men suspected of being involved in the Brussels explosions will remain held in jail.
Yassine A., Mohamed B. and Aboubaker O. are being detained on charges of participating in terrorist group activities. They were among four people detained during Sunday searches in Brussels and the northern cities of Mechelen and Duffel.
Abdeslam, a former small-time criminal, is believed to be the last surviving member of the ten-man jihadist team that carried out the Paris attacks, which claimed the lives of 130 people.
The arrest of the Belgian-born Morocco-Frenchman was hailed by European and US leaders, while French Interior Minister Bernard Cazeneuve said it dealt a 'major blow' to ISIS jihadists operating in Europe.
He was captured in a dramatic raid following a four-month manhunt for the 'world's most wanted terrorist'.
Abdeslam grew up in the Belgian town of Molenbeek.
He worked for two years as a railway mechanic and in the family business including at a bar set up by his brother Brahim.
Abeslam was reportedly childhood friends with Abdelhamid Abaaoud, the man dubbed as the 'Belgian' mastermind of the Paris attacks.
The pair spent time in jail for armed robbery and it is there that it is believed they became radicalised.
When his brother Brahim tried to travel to Syria, he was stopped and Abdeslam was questioned by police.
Belgian prosecutors later admitted they knew he had been radicalised but didn't flag them up as a security threat to France.
For his part in the attacks on Paris Abdeslam is thought to have rented the cars, the attackers used to drive to the various locations to gun people down.
He was described as being the logistics manager and also organised hotels, flats and ammunition.
On the night if the attacks, he was caught on CCTV outside a cafe that was targeted.
His brother Brahim blew himself up outside the Comptoir Voltaire brasserie in the 11th arrondissement
Later, officers pulled over Abdelsam on Saturday morning on the A2 motorway between Paris and Brussels but checked his ID and let him go.
He was travelling with two other people, just hours after he abandoned a car containing three Kalashnikov AK-47 assault rifles on the outskirts of the French capital.
Detectives soon realised their blunder when they discovered that Abdeslam had rented VW Polo abandoned near the scene of the massacre inside the Bataclan theatre.
However, by the time they alerted Belgian authorities the terror suspect had abandoned the car in Molenbeek, Brussels, an area known as the 'jihadi capital of Europe' and disappeared.
An international manhunt was launched.
In the days after the attacks, Belgian security forces staged several raids in the Molenbeek district of Brussels, where he lived, which has served as a haven for several jihadists in recent decades.
But there was no sign of him and he remained on the run for over four months before being captured.