The three attackers have been identified as Said Kouachi, 34, Cherif Kouachi, 32, and Hamyd Mourad, 18, AP reported citing French police. The names and photos of Kouachi brothers were later officially released by the authorities.

The 18-year-old Hamyd Mourad reportedly handed himself in at a police station in Charleville Mézières after seeing his name on the list of shooting suspects on social media, French media reported.

"He has been arrested and taken into custody," another source confirmed.

Investigators quickly identified the brothers because they left their identification cards behind when fleeing the stolen black Citroen they have been seen utilizing in video of the assault, according to TFI.