Two people have been killed in a major explosion at an oil refinery, sources said last night.
It is understood that two petrol tankers collided inside the refinery at Chevron, Pembroke Dock in Wales, killing both the drivers.
Fire crews have been called from across the area to tackle the blaze.
A spokesman for Chevron said: "At 18:20 local time on June 2 2011 an incident occurred at the Pembroke Refinery. Emergency services were called and responded immediately and remain on the scene. The fire has been extinguished. We are taking appropriate action to respond to the situation. We are still in the process of accounting for all personnel."
The Pembroke Dock refinery specialises in processing heavy, lower quality crudes.
A spokesman for the Welsh Ambulance Service confirmed that paramedics had dealt with casualties at the scene and the air ambulance was deployed.