Two tourists died and five went missing after a speedboat capsized off Samui Island late Thursday afternoon.
Of the 36 people on board the speedboat, Angthong Explorer, two are Thais and the rest foreign tourists.
The boat was returning to Samui at 4 pm after a day trip to Angthong Island, as the sea was rough.
But the incident was spotted by several fishing boats which rushed to rescue the tourists, they were able to get them on board apart from two female who tourists died as they were trapped inside the capsized boat.
Five others are still missing.
Of all the rescued tourists, 21 were injured, 7 are in serious condition.
The cause of the incident is not yet known.
Rescue teams have resume searching for the missing.
