A teenager is being questioned following a fight on Barry Island.
Two groups of boys were involved in a disturbance near the RNLI visitor centre on Paget Road at around 6.15pm on Friday 2nd May.
A 15 year-old boy has been arrested on suspicion of affray and assault - and a police investigation is continuing.
Neighbourhood Inspector Gareth Childs of South Wales Police said: "Anti-social behaviour and disorder will not be tolerated. Officers are regularly patrolling Barry Island, and this will continue over the summer."
"I am appealing to parents, not only in Barry, but those in the surrounding communities to remind their young people about behaving responsibly."
Last month, local authorities launched their annual summer crackdown on anti-social behaviour on the Vale's coastline.
Operation Elstree sees police working along alongside coastguards, lifeboat crews and other emergency services, along with Vale of Glamorgan Council, to keep the area "safe and family friendly".

Former Holm View Leisure Centre could become education and community hub
ScoutsCymru members represent Wales at Royal Albert Hall Festival of Remembrance
Plans for indoor market at former Barry Wilko move forward
Police given additional powers to deal with anti-social behaviour in Barry
Senedd passes supplementary budget with £60m boost for additional learning needs
Future of planned festive events in question after criminal damage to Barry Town Hall
Consultation to open on plans for 35MW solar farm near Penarth
No Trains through the Vale of Glamorgan this Sunday
Police and Cardiff City launch operation to tackle matchday anti-social behaviour
Free leaf and fallen fruit collections return in the Vale
Barry retains Fairtrade Town status until 2029
£1m improvements planned for Pencoedtre Park as splashpad work set to begin
Plan submitted for new independent school on site of well-known charity farm
Is your hot water bottle safe?
Solicitor sentenced for defrauding Cancer Research UK
Cate is crowned champion!
WATCH: Winner of The Voice UK Cate McHugh duets with Sir Tom Jones
Barry filmmaker takes her documentary to the big screen in New York
Pupils leave their mark on new school at steel signing event
£3m refurbishment plans revealed for Cowbridge Town Hall