According to investigators, Hamza was one of the four accomplices of Salah Abdeslam, a key suspect in the Paris attacks.
Abdeslam was arrested on March 18 along with four other individuals during a special anti-terrorist police operation in the Molenbeek district of Brussels.
The series of terrorist attacks carried out across Paris on November 13 claimed 130 lives and injured over 350 people. Abdeslam is believed to have provided logistical support to the suicide bombers and shooters. He was charged with terrorism in April.