Image copyright Family picture Image caption Asim Khan's family are being supported by specially trained officers

A 21-year-old man who was stabbed to death in Cardiff city centre has been named by police.

Asim Khan, from Grangetown, was treated at the scene but later died at the city's University Hospital of Wales.

South Wales Police was called to St Mary Street at about 04:50 BST on Sunday after reports of an assault.

A 27-year-old local man has been arrested on suspicion of murder and is currently in custody at Cardiff Bay police station.

Mr Khan's family are being supported by family liaison officers.

Image caption Investigations centred on an area of St Mary Street

Det Supt Richard Jones said: "A young man has tragically lost his life early this morning and we are doing all we can to identify the person responsible.

"CCTV shows a disturbance which starts in the street near McDonald's and moves towards the Oxfam store where the victim has collapsed having sustained a wound as a result of being stabbed."

Det Supt Jones said "significant police inquiries" were continuing and thanked the local community for its "understanding" while cordons are in place.