Two people died and four others were hospitalised after an explosion at a steelworks in Cardiff, according to a spokeswoman for the company.
Witnesses heard a loud bang before seeing smoke rising into the air at the Celsa Steel UK plant in the Welsh city.
"It is with great sadness that we can confirm that two colleagues have passed away and four have sustained minor injuries," a spokeswoman for Celsa said.
"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."