A musician has alleged that police officers punched him to the face with no provocation as he travelled home from a gig.
Singer-songwriter James Kennedy claims he was "absolutely terrified" and thought he was being robbed.
Mr Kennedy, 42, has complained to South Wales Police about the incident in Cardiff which allegedly left him with injuries. The force says it is investigating allegations about a "stop-search" in Whitchurch and treating them "extremely seriously".