Live updates as police cordon off part of Cardiff city centre and person critically ill

Police have cordoned off part of Callaghan Square in the centre of Cardiff as they investigate a serious assault that has left one man critically ill. One man, 43, has been arrested.

White-suited forensic officers in full protective gear were photographed at the scene on the paved area in the middle of the traffic thoroughfare in the heart of Cardiff. The area cordoned off included three graffiti-covered benches and two uniformed officers were also at the scene.

A second area on Hansen Street, Butetown, has also been cordoned off by the Huggard Centre for the homeless. Hansen Street is a small lane off Dumballs Road on the south side of Callaghan Square. The cordoned off area appears to contain bedding and a suitcase. Two police vans are at the scene and three officers are standing guard.

South Wales Police said that they were investigating a serious assault that happened at around 4.30am on Hansen Street.

A police spokesperson said: "The victim has been conveyed to hospital and remains in a critical condition. A 43-year-old man has been arrested on suspicion of grievous bodily harm with intent."