Belgian federal prosecutors said in a statement that the judge ruled European arrest warrants issued for Mohamed Abrini and Mohamed Bakkali by French judicial authorities are enforceable.
Bakkali, 29, is believed to have rented the Brussels apartment where suicide vests used in the attacks that killed 130 in Paris were assembled, and where fugitive suspect Salah Abdeslam hid out for a time before being captured by Belgian police.
The French renewed the arrest bulletin for Abrini the day of the Brussels bombings, but he has not been named as one of the members of any of the three known teams of attackers at France's national stadium, the Bataclan concert hall, or the cafes and bars.
Before today's hearing in the pretrial chamber of the Brussels Tribunal, Belgian prosecutors told The Associated Press they don't anticipate turning over Abrini to the French anytime soon. They are still investigating him over the March 22 suicide bombings at Brussels Airport. He has acknowledged being the "man in the hat" filmed by security cameras there in the company of the two bombers.
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The Brussels judge today ordered Abrini held in detention for another month in connection with the Brussels attacks, as well as five other suspects. Four other people arrested in Belgium for suspected links to the Paris attackers were also ordered kept in custody for an additional month.
"No additional information will be given regarding further proceedings," Belgian federal prosecutors said in their statement.
The Islamic State extremist group has claimed responsibility for the Paris and Brussels attacks. British officials have said Abrini is believed to have traveled to England last summer and met with Islamic radicals there, but have offered no further details.