Swansea Boys' Club: Investigation follows fire seen across the city
An investigation into a large fire at the former Swansea Boys' Club is expected to begin later.
Firefighters were called to the blaze in Mayhill at 20:15 GMT on Thursday and the incident was declared over at midnight.
However, Mid and West Wales Fire and Rescue Service said two fire crews were still damping down at 06:30.
About 20 firefighters attended the blaze. It is not yet known how the fire started.