Sunken Thai tanker floats to surface

Shipping in the Gulf of Thailand is on the alert for a tanker that sank six years ago - and has suddenly risen to the surface.

The vessel is still holding an unknown amount of inflammable liquified petroleum gas, and could explode if hit by another ship.

The trapped gas, which is lighter than water, apparently lifted the tanker from the seabed.

It is now floating with its bow above the water.

The tanker - the Pak One - was on its way to Vietnam when it sank west of Thailand's Koh Krut Island.

Officials are trying to decide the best way to deal with it.

From the newsroom of the BBC World Service