Many workers at a Celsa Steel plant have sustained injuries following a ‘deafening’ blast at the plant that shook nearby buildings.

Six fire crews were sent to tackle the blaze in the basement of the plant, on East Moors Road in Cardiff.

Workers at the plant told Wales Online the explosion was “very loud, deafening”. One worker commented “We were just in the office we heard a huge explosion and the whole building shook we all went to get out of the building.” Another added “There was a big bang, a big boom of smoke and that was it.”

An anonymous local businessman told the BBC:

“We heard a very loud explosion and then saw smoke coming up. It was a massive explosion, really something. The building we are in shook. We are only 100, 200 yards away from where it happened.”

The chief operating officer for Cardiff and Vale University hospital, Alice Casey stated “We have implemented our protocols for supporting major incidents and our teams are preparing to treat those injured.

“There may be delays for non-urgent patients attending the emergency unit at University hospital of Wales and we would ask the public to think carefully if they need to attend the unit and to make use of other health services.”

Celsa directly employs 725 people at its Cardiff site and supports around 3,000 jobs.