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2. The 27-year-old was reportedly from Molenbeek near Brussels. AP reports that he attended one of Brussels' most prestigious high schools. Reuters, citing French radio station RTL, said other suspected attackers were from the same area. The BBC said the neighborhood is known as "a haven for jihadists." According to NBC, Abaaoud, whose parents are Moroccan immigrants, was one of Belgium's most notorious jihadists. He reportedly recruited his 13-year-old brother to join him in Syria.
3. Officials believed he fought along with ISIS in Syria, according to the Guardian.
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4. Police reportedly labeled him a "wanted extremist" in January. Officials said he went on the run after a gunbattle and raid on an ISIS cell in Belgium, the Guardian reported.
5. Police have had him in close proximity before. Abaaoud told "Dabiq," ISIS' English-language magazine, that after leading the terror cell in Belguim, he successfully escaped to Syria. Even though pictures of his face circulated in broadcast news after a police raid, he escaped police questioning in at least one instance.
"I was even stopped by an officer who contemplated me so as to compare me to the picture, but he let me go, as he did not see the resemblance. This was nothing but a gift from Allah," he said.