Protests have broken out in the US state of Louisiana after police shot and killed a Black man on Friday.

Police say Trayford Pellerin was carrying a knife and had been trying to enter a convenience store in the city of Lafayette.

Video appears to show Pellerin walking away from officers, who then shot the 31-year-old after a stun gun failed to work.

Al Jazeera’s Laura Burdon-Manley reports.