Firefighters were called to the Celsa Manufacturing plant in Splott, Cardiff at 10.30am on Wednesday 18 November following an explosion.

The explosion, which led to five workers being treated for injuries, is thought to have occurred in the basement of a building.

A spokesperson from the steelworkers’ union Community said: "We understand the incident was in the bar and rod mill on the site, not in the steel plant.”

Eyewitnesses say a large bang was heard close to the steelworks facility near Cardiff Bay. Workers at the plant told journalists that the explosion was “very loud, deafening”.
South Wales Fire and Rescue Service has confirmed it was dealing with the incident, along with South Wales Police.

Alice Casey, chief operating officer for Cardiff and Vale University Hospital, said staff had been put on alert and that teams were implementing a protocol for supporting major incidents.

Delays at the hospital are to be expected while medical staff treat the injured, and the public has been urged to avoid visiting A&E unless ‘absolutely necessary’.

Anthony Welsh, a serious injury solicitor at Thompsons Solicitors in Cardiff, said: “News is still coming in about the number and severity of the injuries at this stage. Our thoughts are with all those injured and especially with the families of those who appear to be missing.

“Industrial accidents and explosions like this are extremely worrying for staff of course, but also for the local population, particularly as this is the fifth serious incident at this factory in two years.”