The men are alleged members of the Verviers terror cell, which has many similarities and connections with the cells that carried out the Paris and Brussels attacks, but was broken up before it had a chance to strike.
Police let Abdeslam and his friends through, even after they admitted to smoking pot on the ride from Paris to Belgium.
The Belgian capital was placed on alert on the same day that Turkish authorities reportedly arrested a Belgian national suspected of scouting target sites for the Paris attacks.
French police have killed the suspected mastermind behind last Friday's Paris terror attacks, the city's prosecutor said in a statement today.
VICE News was in Saint-Denis as police conducted a seven-hour long raid on an apartment where Abdelhamid Abaaoud — the alleged "mastermind" of Friday's Paris attacks — was suspected to be hiding.
French authorities have embarked on a massive manhunt for Abdelhamid Abaaoud, a 27-year-old Belgian national who was allegedly behind a foiled terrorist attack in January.