Refinery blast was 'accident'

AN oil refinery blast in which four people were killed appears to have been a "tragic industrial accident", police said today.

The blast at Chevron Refinery, Pembroke Dock, south Wales, shook the surrounding area around 6.20pm last night.

Chief Superintendent Gwyn Thomas of Dyfed Powys police said his officers were informing the relatives of the workers who died.

The fire was caused by an explosion in a 730 cubic metre storage tank, which then caused damage to an adjacent tank.

Chief Supt Thomas added: "A police investigation is now under way, with the Health and Safety Executive, and early indications show that this was a tragic industrial incident."