Videos showed hundreds of people fleeing amid gunfire from the Bel Air neighborhood, where the massacre took place. Residents sheltered in the Champ de Mars public square.
Before the attack, strong confrontations between armed groups were reported. Local outlets point to former police officer Jimmy Cherizier (a.k.a. Barbecue) as the person responsible for the violent events.
Cherizier and his G9 gang committed the massacre while confronting members of a rival gang that is based in Bel-Air. The causes of these confrontations are still unknown.