Sitting in front of the closed gates of Senegal's largest university, Boubacar shows footage he took on his phone of police violence during clashes that shook the Dakar campus for several days this week.

"I saw law enforcement officers beating students," said the young man, whose name has been changed for his protection due to the sensitive nature of the topic.

Originally published on doc.afp.com, part of the BLOX Digital Content Exchange.