South Wales Police said, "A 31-year-old man has today received a caution for common assault following an incident in Caroline Street, Cardiff, in the early hours of Sunday, January 9.
"Two men aged 20 and 26 sustained facial injuries which did not require hospital treatment at the time.
"The man was arrested on January 12 on suspicion of assault and was bailed pending further enquiries.
"A 36-year-old man arrested on January 19, also in connection with the incident, remains on police bail."