UPDATED: APR 08, 2016 20:51 GMT
Is the person arrested Friday in Anderlecht, Belgium, the same man seen in a surveillance video wearing a hat at the Brussels Airport moments before last month's deadly terror attack?
Investigators are trying to determine whether Mohamed Abrini is connected to the airport attack. They also are trying to determine whether a man arrested separately was part of the second attack -- at a Brussels metro station -- an hour later.
Abrini was arrested with two others, Belgian federal prosecutor's spokesman Thierry Werts told reporters. Osama Krayem and another person were taken into custody in another police operation, this one in the Belgian capital.
Eric Van der Sypt, another prosecutor's spokesman, didn't identify the other people arrested or give any other details.
He said Krayem might be the the second person "present at the time of the attack at the Maelbeek subway station."
Abrini has been tied to the terror attacks on Paris in November. Now authorities can question him about the airport bombings on March 22, part of the attacks that killed 32 people.
Abrini, a 31-year-old Belgian-Moroccan, had been among Europe's most wanted and was considered "armed and dangerous."
His arrest means that Belgian authorities now have at least two people, along with Salah Abdeslam, who have been directly tied to the attacks in Paris.
"For French investigators, this can be very big," said CNN's Nic Robertson. "This gives you a much stronger position to be in to get to the truth ... to (track) other terrorists on the run down," Robertson said. "And also to understand precisely what happened in Paris."
But according to Peter Bergen, a leading terrorism expert and CNN analyst, Abrini's arrest also puts pressure on Belgian authorities to find out information quickly.

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picz to ascertain his arrest