From BBC site
Some 40 people have been injured after two boats carrying tourists collided in the Gulf of Thailand.
They overturned a few kilometres out to sea while ferrying people to and from a party on Koh Phangan island beach, throwing many revellers into the water.
At least two other people were said to be missing in the collision, which happened close to Koh Samui island.
The monthly event held on full-moon nights is well-known among party-goers, attracting thousands of tourists.
The boats collided late on Saturday, throwing passengers into rough waters just off the island, The Nation newspaper website said.
At least two Britons and four Australians were said to be among the injured, as well as other foreign tourists.
Every month, it is estimated up to 25,000 revellers descend on Koh Phangan for the all-night beach rave.
TBWG