At least two people have been killed and 13 injured in an explosion at an oil refinery in the Gulf of Thailand.
A massive fire broke out after the blast, and firefighters have been battling to keep the flames away from the nine (m) million litres of fuel stored at the site.
Officials at the Laem Chabang refinery in the Sri Racha district say they don't yet know what triggered the explosion.
The blast at the oil refinery at Laem Chabang took place around midnight local time (1700 G-M-T).
Within minutes, much of the plant had turned into a furnace, as flames ripped through it which could be seen from miles around.
Five people were initially reported to have died in the inferno, but the death toll was later revised to two.
At least 13 others were injured.
Firefighters were called in to try to bring the blaze under control.
Their first task was to try to protect the vast oil reserves kept at Laem Chabang.
The explosion damaged three oil tanks - each with a capacity of three (M) million litres.
Those and six others like them had to be drained as rescue teams struggled to contain the flames.
Despite having such a massive oil refinery nearby, the town of Laem Chabang appeared ill prepared for such a disaster.
"With this fire we can't just rely on water anymore. We have to use chemicals and so far we've used all the chemicals that we have in this city. Now we have to wait for backup from Bangkok and we'll try to put the fire out in a coordinated way."
SUPER CAPTION: Seri Kerdthong, Head of Fire Department for Chon Buri province
Officials still don't know exactly what caused the explosion.
It started in one of the oil tanks, and investigators are now looking into the possibility that there had been a fuel leak which caught fire.
"The explosion was caused, we think, by some leakage of the oil and there was some spark around the area and the fire... there's a lot of vapour and oil products in the tank, that's why I think the roof of the tank was exploded out, that's why it caused the big noise and damaged all the glasses (windows) in the area."
SUPER CAPTION: Chulchit Bunyaketu, Managing Director of the Thai Oil Company Ltd.
Local radio broadcast police requests for local residents living within a 10 kilometre range of the refinery to evacuate their homes.
A fire was still burning at the plant more than an hour after the explosion.
But police officials reported the blaze was under control.