A 52 year-old man was taken to hospital following a serious assault in Cardiff Bay.
Detectives say he was punched unconscious while standing on Louisa Place in Butetown at around 11pm on Monday night.
He needed treatment for serious head and facial injuries.
South Wales Police are appealing for witnesses to come forward - it's believed there were a number of people in the area at the time of the attack.
Anyone with information should call 101 or use the live web chat, quoting reference no. 2500274327

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?
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