Oil refinery explosion kills four in Wales

Emergency procedures may need to be examined at an oil refinery in Wales, following an explosion that resulted in the deaths of four people.

The quartet died when a tanker exploded at Chevron's facility, which is located at Pembroke Dock in Wales.

A fire spokeswoman confirmed that there was also a contained blaze at the refinery as a result of the blast.

Speaking to Wales Online, she said: "We are in attendance with five pumping appliances and five specials."

Marcus Lutwyche, owner of the nearby Angle village shop, estimated that the plume of smoke following the explosion was 50 metres wide.

"We thought it had something to do with a jet at first," he added.

Sky News reports that a fifth worker has been airlifted to a nearby hospital with serious burns.

The refinery's general manager Greg Hanggi added the incident is "utterly devastating" and offered his deepest sympathies to the families of the deceased.