Two people have suffered injuries after an explosion rocked the UK’s largest steelworks causing fire to break out.
Locals reported their houses shaking with the force of a blast at the Tata Steel site in Port Talbot in the early hours of Friday.
Several bright flashes could be seen in video purported to be of the incident shared online.
Emergency services including paramedics and firefighters rushed to the complex after 999 calls began to stream in at around 3.35am.
Watch the moment the explosion ripped through the early hours
One local resident tweeted: “There was just a big explosion from port Talbot steelworks that just shook the house, hoping no one was hurt.”
Josh Adams told ITV News the "tremor was incredible. It shook the foundations of my house."
South Wales Police said two people had suffered minor injuries in the incident and urged locals to avoid the area.
Early indications suggested the explosion came from a train used to carry molten metal, the force said.
“Emergency services remain on scene but we have had confirmation that all members of staff are accounted for and there are only two casualties with minor injuries," said a force spokesperson.
“Early indications are that the seat of the explosion was a train which carries molten metal into the works.
“The explosion caused some small fires which are all under control and damage to some buildings on the site.
“South West Fire and Rescue Service have informed us there is no need for concerns re hazardous effects from the smoke from the fire.”
The force added that the M4 motorway remained open.
Tata Steel said its personnel were working with emergency services at the scene.
“We can confirm there are no serious injuries and all employees have been accounted for. All fires are now under control,” the company tweeted.
Aberavon MP Stephen Kinnock said the incident “raises real concerns about safety at the works”.
“It could have been a lot worse. Grateful as always to the emergency services for their rapid and effective response,” he wrote on Twitter.
“@TataSteelEurope must conduct a full review, to improve safety.”