Baltimore police shoot teen carrying 'replica gun'

US police shot and wounded a 13-year-old boy carrying a replica handgun on the anniversary of mass protests sparked by a black man's death in police custody, police said.

Baltimore Police Commissioner Kevin Davis told reporters near the scene of Wednesday's shooting that two officers spotted the teenager carrying what appeared to be a firearm, identified themselves and gave chase when he ran away.

Wednesday marked the one-year anniversary of protests and clashes with police in Baltimore following the death of an unarmed black man, Freddie Gray, in police custody.

Police subsequently took the boy's mother in for questioning, although she was not arrested.