Six members of a family from Ubon Ratchathani had been on a long-tail-boat ride at the famous attraction in Phone Na Kaew district when the boat, suspected of having been overloaded, sank about 800 metres from shore on Thursday afternoon.

Three people including a boy swam to shore but three others were missing initially.

The lifeless body of Umaporn Somboon, 20, was retrieved on Friday at 8am and that of her husband Teerasak Naisawang, 27, at 9.30am, Phone Na Kaew Precinct officer Pol Major Sakkarin Phothinam said.

Divers from the Metthatham Foundation were looking for the last missing person, Manit Somboon, 26.