Nael's mother appealed online for a silent march on Thursday in her son's honor, near the scene of his death.
Videos purported to be of the incident were "extremely shocking," Darmanin said, pledging a full investigation. The images show two police officers leaning into the driver-side window of a yellow car, before the vehicle pulls away as one officer fires into the window. The car is later seen crashed into a post nearby.
Macron called for calm and for respect for Nael's loved ones. Asked about police abuses, he said justice should be allowed to run its course.
"Nothing justifies the death of a young person," he told reporters in Marseille.
Darmanin said 1,200 police were deployed overnight and 2,000 would be out in force Wednesday in the Paris region and around other big cities to "maintain order."
