Armed police shut a Welsh market town's high street after a report of a knifeman. A heavy police presence was seen in Cowbridge on Tuesday night as a police helicopter searched the area.
A South Wales Police spokesman said on Wednesday: "At around 9.40pm last night officers responded to a report of an incident on Westgate, Cowbridge, where a man was seen in possession of a knife. The police helicopter assisted with a search of the area.
"Armed officers were deployed as a precaution to ensure the safety of the public and police officers. A 20-year-old man was located and detained under the Mental Health Act."