End of coveragepublished at 18:09
That brings an end to the live coverage of the explosion at Celsa Steel UK in Cardiff.
For the latest information and updates, see here.
Summary
Two people die in blast at Celsa Steel UK in Cardiff
Five people injured
Four of the casualties treated at University Hospital of Wales
Health and Safety Executive assisting police with investigation
Emergency services were called at 10:30 GMT on Wednesday
End of coveragepublished at 18:09
'This cannot happen again'published at 18:07
Roy Rickhuss, general secretary of the steelworkers' union Community, said: "This is absolutely tragic news and our immediate thoughts are with the families and colleagues of those who died and those who were injured.
"Lessons will need to be learnt from what happened so that this cannot happen again but for today we should be focused on supporting everybody affected."
Ambulance responsepublished at 17:53
Chris Sims from the Welsh Ambulance Service NHS Trust said there was a "thorough and robust" response to the explosion by emergency services.
He added: "The Welsh Ambulance Service's thoughts are with everyone affected by the incident."
'Extremely difficult'published at 17:46
Ian Greenman from South Wales Fire and Rescue Service described the fire as "an extremely difficult and arduous incident involving an explosion in the basement".
"Crews worked tirelessly to effect rescues and deal with the fire. Despite heroic attempts, unfortunately we were unable to save two on-site personnel," he added.
Police statementpublished at 17:39
Supt Stephen Jones of South Wales Police told a press conference at Celsa: "Two members of staff were unaccounted for and sadly I can confirm that we have found two bodies.
"We've informed the families and are continuing to support them at this difficult time.
"Our priority at this moment in time is to recover the victims, support their families and carry out an investigation to find out what's occurred here today."
'Devastating'published at 17:13
Image source, Getty ImagesQuote MessageThis has been a truly devastating day for the families of the two Celsa employees who tragically lost their lives. I want to send my sincere condolences to them and to their colleagues at this extremely difficult time. Our thoughts are also with those who were injured.
Stephen Crabb, Welsh Secretary
'Deeply saddened'published at 17:13
First minister commends emergency services
Carwyn Jones said: "I was deeply saddened to hear about the death of the two Celsa workers who tragically lost their lives today. Our thoughts go out to their families and friends at this very difficult time.
"I commend the work of the emergency services who responded quickly and professionally to deal with the emerging situation and hope those recovering in hospital make a full recovery."
'Truly Tragic'published at 17:03
Image source, BBC WalesQuote MessageThe news about the explosion at Celsa is truly tragic. My office overlooks the plant and when I heard the bang and saw smoke billowing out from the roof I immediately feared for the safety of people in the plant. Our thoughts and prayers are with all those affected and their families.
Phil Bale, Cardiff council leader
'Thoughts with family'published at 16:57
Welsh Conservatives leader Andrew RT Davies
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End of twitter post'Deeply saddened'published at 16:56
Cardiff Labour MP on Twitter
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End of twitter post'Desperately sad news'published at 16:54
Welsh Lib Dem AM for South Wales Central
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End of twitter post'Great sadness'published at 16:49
Celsa UK statement
"This morning at 10:30 there was an explosion at the rod and bar mill of our plant in Cardiff.
"It is with great sadness that we can confirm that two colleagues have passed away and four have sustained minor injuries.
"Our thoughts and deepest sympathies are with those affected and their families, who have been informed.
"Our utmost priority is to support all of those involved and we are in close contact with the University Hospital of Wales, where the injured are being cared for.
"Operations have been suspended and the fire services have confirmed that the mill is safe."
Image source, Wales News Service'Two dead' in steel plant explosionpublished at 16:43
Celsa UK confirms two people died in Splott blast
Image source, Wales News ServiceUpdate in one hourpublished at 16:34
South Wales Police said its update on the explosion will now be made at 17:30.
What does Celsa do in Cardiff?published at 16:28
BBC Wales' business correspondent Brian Meechan explains
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End of twitter postCasualties 'received oxygen'published at 16:19
BBC Wales' Steffan Messenger from University Hospital of Wales
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End of twitter post'Dreadful wait' for familiespublished at 16:05
Labour AM for Cardiff Central tweets
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End of twitter postSpecialist search unitpublished at 15:54
A specialist police search unit has arrived at the Celsa site.
Police earlier said two people were "unaccounted for" after the explosion at the steelworks.
'The doors blew open'published at 15:45
BBC Wales' Dave Dulin at the scene
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End of twitter post'Worrying'published at 15:38
Assembly hears from first minister about explosion
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End of twitter post